Zhang Feng is very excited.

Because soon, he will have three wheels to ride!

In the crucible, the molten iron was boiling, and the sweat on Zhang Feng's face was flowing like rain.

But he is happy.

There are no screws now, but can it be difficult to live Zhang Feng?

no

He thought of a wonderful thing, that is tenon and tenon!

Melt it with molten iron, then pour it into tenons and mortises, and then burn it red with fire, pass through the places that need to be fixed with screws, and smash it flat with a hammer. Although the effect is a little poor, it can pass.

At least it won't fall apart.

But at this time.

The door of his tavern was knocked again.

This made Zhang Feng speechless.

Although other parts of the tricycle are hidden, this small crucible is still very conspicuous.

Anyway, if someone doesn't understand this thing, he really can't understand it.

Unless he's a jumper, who knows this?

no

There is another kind of person, the carpenter.

Or a blacksmith.

But Zhang Feng's intuition is that the visitors are either old scholars, old he or dogs.

But it's strange to say that since gouzizhu and some of them heard from the mouth of drunken old scholars that they were going to open an academy, they basically didn't come.

It seems to be the meaning of father Zhu.

However, Zhang Feng is also busy these days and has no time to ask.

We can only wait until the Academy opens.

"Dong Dong Dong!"

Zhang Feng dared to put out the crucible, and the knock on the door rang again.

Zhang Feng hurriedly got up and shouted as he walked, "come, come, the door is unlocked. Just push it open!"

But no one spoke.

This can't help but make Zhang Feng a little confused.

Open the door.

But I finally understand.

What is the reason.

"Old Du? What are you doing here? Come on in!"

The visitor is Du Ruhui in plain clothes.

Seeing Zhang Feng open the door, he instinctively hugged, but he was pulled in by Zhang Feng, and then closed the door again. But in such a short time, at least more than 30 locusts and grasshoppers flew into the tavern.

After greeting Du Ruhui to sit down, Zhang Feng asked suspiciously, "old Du, are you coming today?"

"It's not because of the rabbit son of my big cake."

Du Ruhui said unhappily.

"What happened to the big cake?"

Zhang Feng was surprised.

Is this product stunned by studying the division formula?

He really doesn't worry about others, but he's really worried about this bookish Du pancake.

At the beginning, Zhang Feng gave this thing to him because it was too fucking wordy. He also deliberately said when he could calculate the division within three digits in one mouthful, so he could calculate the division. This goods should not

"Old Du, is the big cake okay?"

"Alas! It's all right. I've been going back these days. I don't step out of the gate. I've heard him reciting arithmetic and division in the room all day."

"So, I'm here to ask if you have any good way. It's not a way to go on like this! Brother Zhang Feng, can you show me?"

"Well..."

Zhang Feng is a little confused.

This is a good thing!

You know, this thing will be a new thing that will be popular in Datang in decades!

Isn't that good?

Although at that time, there were less than 20 people in Guozijian who studied mathematics, what did this mean?

But these twenty people, in the end, were the elite among the elite. Basically, they created the legacy of Zhenguan, and the prosperous era in the hands of Wu Zetian, even the later Kaiyuan prosperous era, which laid a foundation that can not be ignored!

This is the prosperity created by a group of guys with brain speed up to 75% under the leadership of an emperor who knows how to appreciate them.

Without these people, do you want financial prosperity and prosperity in Datang?

No no no!

At that time, people were going to kill all the pits. Don't mention so many guys who coveted the fat meat of Datang, let alone the fact that Datang only needed a boat and a flag, which made people tremble. Without these people, maybe the influence of Datang's Kaiyuan heyday might exist, but it could not be so brilliant, It affects the whole world.

Why?

Dozens of people do nothing every day and think about it. Can you do it?

That's weird.

Arithmetic.

This not only includes addition, subtraction, multiplication and division, but also includes military planning, regional distance division, and so on.

Think of this.

Zhang Feng mysteriously bumped Du Ruhui with his elbow and said, "old Du, let me ask you something."

"Say!"

"Look at your son's big cake. He is so obsessed with it. Do you think he will become a monster in five years?"

Du Ruhui said with a black face: "brother Zhang Feng, even if I came here today for this matter, doesn't that man want to protect the country and serve the country? He's like a demon all day, so don't tease me!"

"No, no, no!"

Zhang Feng waved his hand again and again.

"I'm not sarcastic. Seriously, I believe you've read the division. I ask you, what if this thing is used in commercial operations?"

"What if it's used elsewhere?"