>>213494380 (OP)>7 men have 7 wives.This statement on it's own could be interpreted two different ways, but the second statement seems to make only one interpretation correct.
>Each man and each wife have 7 children.This implies that each individual has 7 children, not that there are 7 children per couple.
Any solution involving polygamy contradicts the second statement.
If each man has 7 wives, and each of his wives has 7 children, then each man must have 49 children.
Conversely, if each man has 7 wives and 7 children, that would mean that each of his wives must have 1 child.
If we assume instead that the first statement means that there are 7 men who collectively have 7 wives, there are no contradictions.
Each man has a wife and 7 children, so their wife obviously also has 7 children.
Since there are 7 couples in total, and each couple has 7 children, the total number of people is 63.