Cheng Zhijie's showdown made Li Yuanjing slightly embarrassed, he didn't expect Cheng Chumo's bastard to be so unresistant, and he picked up the old bottom so quickly.

"Let's go, I'll take you to see!" Li Yuanjing's face was small, and it was impossible to return the money.

How can the money that was finally cheated out be returned so easily?

Besides, his purpose is not to cheat money, but to bring him to make money.

After more than half a month of hard work, Yang San has already led someone to get the excavator out.

There is no choice to do it in one step, and the current excavator still has no walking ability, but it can dig soil.

Li Yuanjing took the two of them directly to the iron-smelting workshop, where the experimental excavator was born.

In order to save time, and by the way, in order to facilitate the later processing, Yang San did not choose a more troublesome process, but chose parts casting.

One of the biggest weaknesses of the cast parts is that they are not dense enough, in other words, they are not very strong.

Normally, they would choose to continue forging to strengthen their toughness, but this time they didn't choose to do so, this is just an experimental thing, mainly to see if it can work, and if it proves to be feasible, the real excavator will be built later.

As for the one in front of me, it just melted and redone, it is nothing more than a waste of some coke, manpower and time, and the iron-smelting workshop is now idle, and there is no problem with stopping for two days.

"What is this?" Seeing the big guy in front of them, the eldest grandson Wuji and Cheng Zhijie were very frightened.

"Something that can make a fortune!" Li Yuanjing smiled slightly and beckoned to Yang San.

Make a fortune?

The eldest grandson Wuji and Cheng Zhijie were stunned, they didn't see where they could make a fortune, but it was quite ruthless to waste iron.

"Your Highness!" Yang San hurriedly ran over with a smile.

"Does it work?"

"Yes! Little one, go and try it, Your Highness, and you'll know! Yang San's face was full of excitement.

With Yang San's operation, Li Yuanjing found that the big guy in front of him seemed to be a little different from the model he had seen before.

Then he realized that Yang San made some changes to the gears, and the operating gears were changed from large gears to small gears, and people can operate them when they stand there without moving, while the original large gears were hollowed out, which can reduce some strength.

The pinion drives the big gear, and the big gear is driving the pinion, and below the big gear there is a rectangular open box filled with black oil, and the underside of the big gear is always soaked in oil.

As the gears turn, the oil is attached to the gears, and then passed to the smaller gears, one gear after the other, and eventually all the gears are glued to the oil.

It may have been a bit of a struggle at first, but with oil filling every big and small gear, the operation was a lot lighter.

However, for Yang San, it is still a little difficult, after all, the teenager is far from mature.

Yang San's operation was a little rusty, but it did not affect the final result, a bucket went down, about half of the depth was dug, in fact, it was about a foot deep, a foot and a half wide, and a small pit three feet long.

"Is this for digging graves?" Seeing that the iron guy in front of him was digging the soil, Cheng Zhijie couldn't help but snort.

“……”

Li Yuanjing was angry and white-eyed Cheng Zhijie, such a cheating excavator, you actually said that it was a grave digger?

Can't you just use your little brain and think about what else this thing can do?

"Xiuhe seems to be pretty good...... Cheng Zhijie scratched his head and continued.

Li Yuanjing felt that Cheng Zhijie really couldn't remember, and said directly: "It can be used to dig coal and dig all kinds of mines!" ”

Listening to Li Yuanjing's description, the eldest grandson Wuji's eyes suddenly lit up, and he subconsciously stepped forward and directly squeezed Yang San aside.

Looking at a few gear turntables and a little confused, after carefully inquiring, I personally operated it.

Changsun Wuji first got used to it, and then began to gradually speed up, heavier, but acceptable, after the front bucket and the ground contact, there will be an obvious resistance, at this time it will take more strength to dig.

This time, the eldest grandson Wuji dug out more soil than Yang San, after all, adults, the strength of the two is not at the same level.

"How much does it cost? And how much are you going to sell it for? The eldest grandson Wuji asked repeatedly.

"How many pounds of iron did you use?" Li Yuanjing turned his head to look at Yang San.

"Your Highness, it probably took nearly three thousand catties, if it is all done, it may take about three thousand five hundred catties, and in addition, I think it is best to replace the gears with steel, which is more durable."

"It's just the cost of materials, you calculate it yourself!" The corners of Li Yuanjing's mouth rose slightly, and he said to the eldest grandson Wuji.

"How is this calculated?" The eldest grandson Wuji was stunned, and his head was full of black lines.

Iron is a controlled item, there is no price in the market, even if there is blast furnace iron smelting, the output of steel has increased exponentially, but due to the speed of ore mining, so the current steel is still not enough.

As long as the product is iron, it is not just a matter of price.

The eldest grandson Wuji glanced at Cheng Zhijie with regret on his face, and said slowly: "Your ten thousand yuan is doomed to lose!" ”

"Such a good thing, what's the loss?" Cheng Zhijie was a little panicked in his heart, but he was still strong.

That's Cheng Chumo, that bastard stole the family's house deed mortgage, if he loses it, what will he do with his house? A family living on the street?

What's more, I have to beat him when I go home, thinking of the two brothers Cheng Chumo and Cheng Chuliang who are still lying on the bed now, Cheng Zhijie felt that he had beaten him lightly......

"The imperial court doesn't have so much iron for you to do this, three thousand five hundred catties of iron, counting some others, how much does Your Highness think it should be sold? One 10,000? Or 20,000? With this money, how many laborers can you find Your Highness to calculate? The eldest grandson Wuji said the reason.

Even though the population of Datang has decreased sharply, it is still that era when manpower is worthless.

Recruiting a coolie is enough for three or five dollars a day, and counting food and drink, eight dollars for a more demanding coolie is enough.

10,000 yuan, even if it is calculated according to the usual 700 yuan, it can recruit 2,400 laborers to work non-stop for a year.

In other words, can a single thing that works for a year be more efficient than more than 2,000 people for a year?

Therefore, this is destined to be a failed investment, in addition to not being cost-effective, the imperial court will not give him so much iron to waste, what if this iron is lost and is made into a weapon?

"That's not how the accounts are calculated!" Li Yuanjing shook his head, he didn't expect that Eldest Sun Wuji would use such an algorithm to settle accounts.

It's true that manpower is not valuable, but sometimes, in some places, at most, you can accommodate so many people at the same time, even if you have 10,000 people waiting there.

And the reason why a machine is a machine is because of its efficiency.

Pointing to the pit in the ground, he said: "It can be dug one foot deep, one and a half feet wide, and three feet long at a time, and this king has calculated that it can dig about one hundred and twenty times in an hour, and according to the calculation of one hundred, it can dig four hundred to five hundred times a day, how many people do you think it will take to compare with it?" ”

The eldest grandson Wuji is full of black lines, how can this be calculated?

Li Yuanjing smiled, counting the area, three times is about 3.6 cubic meters, and a normal person can dig so much in a day.

"Three strokes is equal to a day of work in the prime of life, and one day is equal to at least one hundred and thirty laborers, how big is the mine? Give you 100,000 people, can you pretend? ”