The villagers and children from the village have returned. Last night, the people from Zhuangzi had withdrawn to Zhuangzi further away. Now that they knew everything was fine, they came back again.

When Su Xiaomei saw Su You, she rushed over: "Brother, are you okay?"

A group of smaller children also talked around the older child, while looking at the people from the Erlin Department curiously.

Seeing so many children, Atunmi took another high look at Su You, and also felt a little longing for the warmth of the Song Dynasty.

In the three hundred miles of mountain forests surrounding Erlinbuzhong, the jungle law of the jungle does not allow such a scene to exist.

Su You smiled at everyone and said: "You came back just in time. It was all a misunderstanding before. These soldiers have built a house for us and are waiting for you to come back to build wooden beds and furniture and prepare to move into a spacious house!"

The children all cheered and chirped to express their gratitude to the soldiers of the Erlin Division.

The soldiers could not understand Chinese, but the children's sincere smiles made them smile.

In the next two days, Shijiazhuang provided vegetables and meat, and the children were responsible for the meals of the soldiers. The soldiers learned to use circular saws to modify wooden boards, square wood, and build furniture. The progress was very fast.

Mr. Fan was very impressed by Su Xiaomei's ability to comprehend. They communicated with each other all day long. Su You didn't know what Su Xiaomei had learned, but Mr. Fan and several accountants were very interested in Sanskrit numbers and double-entry accounting.

.

Su You did not hide it. To him, this thing was just a means to promote business circulation management. Instead, he hoped to use economic means to gradually bind the Erlin Department and Meishan Jiangqing together to become Meishan Business.

The group’s powerful foreign aid.

Transferring industries and bringing self-respect to foreign countries was a last resort before a large number of scholar-bureaucrats from Xichuan entered officialdom because their strength was too weak. Su You was not pedantic in this regard.

The meal must be eaten one bite at a time, and things must be done step by step. This is what the Master said about asking questions carefully and thinking closely, and benevolence lies in it.

As for whether the Erlin tribe would backfire when it became stronger, Su You had no such worries. Historically, the Southwest barbarians up to the Wuxi barbarians were basically completely beaten and assimilated in the Song and Ming dynasties, and finally completed their return to their native lands in the Qing dynasty.

Once you integrate into the big ethnic family, you will no longer be different from the Han people.

The barbarians in the south are still different from those in the north, well, except for the far, far corner of the continent...

I have thought too far, but now we are still engaged in construction. There are soldiers taking turns operating the wheel saws, and there are small timbers exchanged from Shijiazhuang. The wooden cubes, planks, and running water are generally sent down from the processing table.

Su You also made a planer, which was similar to turning the planer sideways and nailing it to the table, but the blade was much longer. The soldiers pushed the wooden cubes or stacked boards to quickly get smooth wood.

pieces.

The power of batch processing of standard parts has finally come to light. If it can be connected by punching holes and nailing it with bamboo nails, try to use bamboo nails. In just two days, the wooden beds, desks and chairs, cabinets, blackboards, clothes, etc.

The boxes and shelves gradually became fuller.

The fineness is indeed not fine enough, but with the appearance of self-assembled wooden furniture in the minimalist style of later generations, there is another kind of beauty.

Atunmi was amazed at this efficiency and requested that when he went back, all the planers and rivet benches should be taken away.

She was also interested in children's courses, but she was more interested in short stories about liberal arts. As for math addition, subtraction, and area calculation, it really gave her a headache just to see them.

Today's math lesson is about measuring pi.

The tool is a small gear scraped from hardwood. Thirty-six teeth are cut out with a ruler and compass. Then, ink is applied and the length of the 360 ​​teeth is drawn out on a straight line. The stick is cut off and installed on the gear as a large circle.

radius.

Then scrape mud on the flat ground and use the gear to push out a large circle with a radius of 360 teeth.

Then divide the number of teeth on the great circle by the number of teeth in diameter to get pi.

Afterwards, the experiment was given to the children, allowing them to freely adjust the radius and calculate the relationship between the number of teeth on the great circle and the number of teeth on the diameter.

Then everyone discovered that this number was actually an almost constant value.

Su You concluded: "This number is called a constant. There are many such constants hidden in the laws of heaven and earth. As long as they are discovered, it will be of great help to our production."

"For example, Brother Qi can now calculate the amount of mud required for a circular mud cake. Next, we will explain how to use this constant and the radius of the circle to find the area of ​​the circle..."

"...Okay, this is the method, but for this constant we currently take 3.14, which is actually not accurate enough."

"How to derive accurate pi? Two great mathematicians in ancient times, Zu Chongzhi and Liu Weizhi, left us precise derivation methods, but this requires you to continue to study mathematics in depth before you can master it."

"...Tomorrow we will start to explain some magical properties of moment rulers and how to solve some theorems. That's it for today..."

The children dispersed, and Mr. Fan came over and cupped his hands and said: "Mingrun, you can analyze each question in "Nine Chapters" clearly and clearly. Starting from the preliminary addition and subtraction, from easy to difficult, you can form a tower from easy to difficult, and write "Arithmetic" eloquently and perfunctorily.

"Preliminaries", "Geometry Preliminaries", and "Nine Chapters of Derivation" are really amazing."

The first two were textbooks, and the latter one was actually a collection of exercises. Su You did not dare to reveal his true thoughts, so he handed over his hands to Mr. Fan and said: "Children are weak, so they can only use arithmetic and develop some machines to save energy. To put it bluntly,

Okay, this is just a basic craftsman’s book, and I don’t deserve Mr. Fan’s praise.”

Mr. Fan said: "Mingrun is too modest. Not to mention anything else, this week's rate is related to astronomical calculations. The whole Song Dynasty, no, the whole world can tell about Zhou Xiang. I dare say that I can count them with two slaps.

However, Mingrun’s method has many loopholes..."

Su You smiled and said: "Indeed, compared to Liu Gong's art of cutting a circle, this method is inferior, but it is easier to understand and discover. We need everyone to master the concept of the art of cutting a circle, and then deduce pi. The progress will be fast.

It still takes two or three years of study, and those who progress slowly may take five or six years."

Mr. Fan took Su You's hand and said with a smile: "Come on, come on, I am still proficient in "Nine Chapters", but the art of cutting circles is indeed too advanced. Please tell me first, as well as your creation

That decimal is also worth studying..."

Confucianism is still in the final stage of exegesis and exegesis. Taoism has just begun to emerge, followed by decades of debate, and finally Cheng-Zhu Neo-Confucianism as the representative has ruled for thousands of years.

Therefore, the people of the Song Dynasty today are tolerant and eager for all kinds of knowledge. Confucianism, Yi, Taoism, Buddhism, and even astrology, divination, medical treatment, military, geography, astronomy, all kinds of aspects...

Among the scholar-bureaucrats there were many talented people who studied mathematics, and many experts even advanced their research to an extremely advanced level.

When Su You came to this world, he believed that mathematical research was not his responsibility. Those who were above him, the Qin Tian Jian, the General Supervisor, and the Accounting Department, all had talents that could only be measured in a car.

His mission is to disseminate mathematics, to make mathematics step down from the altar and become something that the common people can use to guide production and transform it into productivity, rather than a purely academic research that is metaphysical and illusory, or only used in astronomical calculations.

He wanted to use a simple and easy-to-remember scientific annotation system to display the profound speculative proofs in the minds of mathematicians of the Song Dynasty on paper one by one, so that more people could come into contact with them, understand them, become interested, and delve deeper into them.

, inspire more geniuses, rather than just being in the hands of a few people and passing them on by word of mouth.

At this point, Su You actually believed that what he did was of the same nature as what Confucius did during the Spring and Autumn Period.

Moreover, Su You believed that it was much less difficult for him than when Confucius traveled around the world and struggled to sell his theory.

To put it bluntly, everyone in the world is interested in profit, and with this set of things, you can see immediate results.
Chapter completed!