The old man glanced at him a few times, then looked at Qi Si and said, "My eldest son has gone to serve his duty, so now it's just me and my youngest son working. Li Ma will tell you that I'm slow at making bricks. How many do you need","Have you been to the quarry about getting stones for your brick house",Then he told Yan Lao Er, "I'll calculate half the amount for you first. When you return from the quarry, tell me the exact number."。