Shi Kuan hesitated and said: "Fourth brother, this child... was given by heaven? He was brought out of his mother's womb?"

Shi Fu said: "I don't know this. I only know that he is good at guessing things, observing details, and is especially good at arithmetic. Give him a magnet to play with, and he will be able to find the iron layer under the sand by the river; give him a copy of "Nine Chapters"

, he can deduce the art of squaring and using it to cut circles. Brothers, do you know how shocked I was at that time?!"

After speaking, he pointed to the exquisite folding knife: "What does such an exquisite utensil mean to Su You? It's just a plaything he gave to Wei'er, just a piece of cake."

Shi Kuan looked at the folding knife and handed it to Shi Fu: "Tell us about the mechanism."

Shi Fu said: "I can't explain it clearly, but Su You drew the drawings. Looking at his detailed drawings, you can see that Su You's art is not just as simple as mechanism design. He is passing on a knowledge to us. Let's look at ourselves.

Can you understand it?"

After saying that, he ordered his disciple to get the drawing, open it, and put on a vernier caliper: "This drawing, combined with this magical ruler that can measure to one-third of a centimeter, can be called engineering according to Su You.

"

"This science is based on arithmetic. If you master it, you can create all kinds of artifacts, ranging from giant anchors to giant anchors, to buildings hundreds of feet tall, to clothes hooks, arrowheads, and jade locks and gold rings. All are exquisite and extremely fine.

."

Shi Shou picked up the copper ruler and said, "How can you measure this so finely? Wait, the scale is so fine. Is it carved with a needle? How can such a thin needle not break under force?"

Shi Fu said with a smile: "Three brothers, please put aside your prejudices. After my younger brother explains it to everyone one by one, you will know the ingenuity of Su You's mind."

After Shi Fu explained the working principle of the vernier caliper, he then talked about the forging principle of pattern steel, then the smelting and etching technology of brass, and finally said: "This guy's theory seems mysterious, but it makes sense.

, in fact, it is a delicate one. For example, patterned steel, the most we used to do was fold it. How could we expect so many tricks? To put it bluntly, this is actually the craft of making dough-shaped dolls."

"Another example is the centimetre. Calipers have been around since before the Han Dynasty, but with the addition of the principle of compensation deduced in the nine chapters, the accuracy is increased tenfold. The principle is so simple that it is not difficult to understand. But we, big engineers, have

Unexpected."

"There is also brass. We all know the principles of bronze. The same principle applies to brass. However, Japanese lead is easy to consume. When exposed to fire, it turns into white lead and is difficult to fuse. Why didn't you think of adding a cover to it to isolate the air? This

…This is exactly what braised mutton is all about!”

At this time, the attitudes of Shi Fu and the other three people were completely reversed. Shi Kuan said: "That's what I say, but if you can think of exercising feather patterns through face-shaped dolls, you can think of smelting brass from braised mutton, you can think of smelting brass through

He can deduce the complement relationship through addition and subtraction and apply it. This kid is really..."

Shi Shou said: "Brother, why don't you go and tell Su Bagong across the street that the Su You incident can be forgotten and the two families can get back together."

Shi Wan said: "It is the decree of the Heavenly Master that these five feather-patterned swords must fall on Su You. Otherwise... the iron workshop will raise his shares again?"

Shi Kuan thought for a while and asked, "Fourth brother, what do you think?"

Shi Fu raised his nose and raised his eyes: "He's so beautiful! He's ruined my Wei'er's reputation! He has to be held responsible for this!"

Shi Kuan was very depressed: "Fourth brother, the Su family cannot offend now..."

Shi Fu plausibly said: "After what happened, can Wei'er get married easily? This thing was caused by Su You! He must marry Wei'er! The two of them are still young, so let's make an appointment first, and then wait.

Weier has grown up, and the big sedan is here to carry it! Brother, let me tell you, now we have to act like they are in the wrong if they call for punishment. Su Bagong is an honest man, and he will accept this!"

Shi Kuan suddenly realized it and said with a smile: "It makes sense! Now it seems that it is fortunate to have the previous incident... My Shi family has found a treasure this time."

…

Not to mention that the four brothers of the Shi family were calculating the details, Su You was shopping with the fifth group of children at this time.

Ten guan is enough to buy something else as long as you don't buy clothes.

The first thing I went to was the grain store, where I bought black beans, mung beans, sesame seeds, peanuts, rice...that's nearly a hundred kilograms, twenty kilograms of soybean oil, and five kilograms of tea oil.

Then two stones of rice, then a fine sieve, a dustpan, a dustpan, a mat, a vegetable pile... all kinds of rough ones for household use.

In the end, 20 sets of gold rush wooden dustbins were customized at the carpentry workshop, which cost less than five guan in total.

The valuable ones were iron tools, axes, kitchen knives, knives, planes, saws... Shi Tong originally wanted to give his master a set, but Su You refused.

But this thing is really expensive, so I have no choice but to pay on credit.

Then I bought paper from the Cheng family and pottery from the Shi family, but these were all paid at market prices, without any credit.

Cheng Wenying and Shi Dongxiu smiled and watched the children moving things, letting Su You fool around.

Coal is cheap now, and pulverized coal is even cheaper. Su You also cost a large truckload, which only cost 500 cents.

I also bought a small square stone mill and two pairs of wooden barrels. These two items are also expensive now, and there are more than three in total.

Returning to Tutu Temple, Su You called the children together, took out the notebook, read it to them one by one, and then said: "A total of seven thousand four hundred and thirty-five coins were spent, and there are still two

Five hundred and sixty-five guan, which is a total of ten guan. In addition to purchasing ironware, I still owe Shijia Iron Shop 25 guan! The account book is here. I lent these to you, and you will have to pay me back in the future.

."

The second child was older, about ten years old. He was frightened when he heard this figure: "Young master, we can't afford to pay back so much money..."

Su You said: "If you can't afford it, then make money! From today on, follow me and learn to make money!"

The fourth child said: "Young master, it's not that you don't make money. When my eldest brother took us, we only earned enough to eat and drink for the younger brothers and sisters in a day. We even had to rotate our clothes. How can we pay for this..."

Su You put the notebook on the table, pulled out another notebook, and said, "Don't worry, I'll count everyone's names and ages first. The second oldest one will start with you."

The second child said: "My surname is Li, and my family calls me to tie me down. My age, young master, please write twelve!"

Someone immediately quit and said, "You're lying to me! You're just a bit older. You're only eleven years old!"

The second child raised his eyebrows: "What's the fuss about?! I'm the second child! The second child is just a little younger than the first, twelve!"

A group of children started to humiliate him, causing such a fuss that one of Su You and the other two were as big as Su You. They banged on the table to stop it: "Don't make any noise! ​​Don't make false claims, brother. Just tell the truth, so that I can allocate work to everyone according to their physical strength."

I finally became honest. When the statistics were compiled, I found that many children had been abandoned for several years. Not to mention their nicknames, they didn’t even know their own surnames.

Su You frowned: "Otherwise, your eldest brother is everyone's benefactor. If you don't know what your surname is, how about everyone's surname is Zhang?"

Xiao Zang said: "No! Then don't I call you Zang Zang?"

Su You smiled and said: "Xiao Zang is no longer dirty now. I can't use such an unpleasant name anymore. If I want to apply for official status in the future, I might as well call her Xiao Mei."

Xiao Zang still refuses: "Then it's still Dirty Girl!"

Su You was so troubled that he couldn't help it: "Yes, yes, do you agree with my surname? Su, little sister Su! Wait, this is a proper noun..."

But Xiao Zang had already run away: "Oh! From now on, my name will be Su Xiaomei! None of you are allowed to call me Xiao Zang anymore..."

Uh, okay, anyway, the Su Xiaomei in history was originally a fiction, so just use it!

Today is mainly about retreat, just like the class teacher meeting new classmates at the opening ceremony, announcing the names, setting up a few class rules, talking about hygiene, cleaning, etc., and then arranges for the girls to paper the windows, while the boys continue to knead the mud.

The remaining little ones were asked to collect firewood in baskets, while he took a few big ones to chop bamboo in the bamboo forest.

After walking a long way, he saw some big moso bamboos. Su You selected a few old ones and taught the boys to saw them off. Then he shaved off the bamboo branches with a kitchen knife, tied them into a big bundle, tied them to the moso bamboos with bamboo strips, and pushed them into the water.

It was lowered to the entrance of the stream into the river and then dragged onto the beach.

Seeing a bunch of dry reeds by the water, Su You also asked the children to collect them and bring them back to the Tutu Temple.

Putting the bamboo under the eaves, Su You circled the bamboo pole with a fine hemp rope, took out a pencil, drew parts with almost the same diameter and thickness, and asked a few older children to saw out some bamboo tubes with a diameter of three inches and a height of three inches.

Then use sand to smooth the inner surface, take clay, roll it into a clay board, and use a bamboo tube to cover it with some round clay pieces.

Use a compass to draw a picture on the clay piece, mark the points, and use a bamboo stick as thick as your index finger to poke evenly distributed round holes of the same size.

Dry this piece of clay and use it as a mold to make the same holes in other small clay tablets.

I also made two large round clay tablets with holes on them, one with many holes and the other with only five.
Chapter completed!