Analysis:
According to: Xiao Ming's workload is 7/ 13 of the total workload completed by the other three people.
It is concluded that the number of Xiaoming is 7/20 of the total number.
According to: the number of small soldiers is 65438+ 0/3 of the total number of others.
It is concluded that the number of small soldiers is 65438+ 0/4 of the total number.
According to: Xiao Fang made 1 1/29 of the other three people.
It is concluded that what Xiao Fang does is 1 1/40 of the total.
It is concluded that Xiaohong did1-7/20-1/4-11/40 of the total.
= 15/40
Finally: 150÷ 15/40=400.