Qiao Er held the abacus and sweated profusely calculating various materials.

It's not that his arithmetic skills are not good, it's that the scene is too chaotic, and the things that have just been counted are moved again as soon as he turns his head.

Zhang Yuqing found two and a half sons as apprentices and handed them over to Qiao Er, and the situation improved.

However, even so, the construction material still exceeded expectations by almost 10%.

A lot of this is due to the fact that the prefabricated parts are not well communicated

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