@CNviolations Each man has 1 wife, so there are 7 wives.
Each man and wife together have 7 children, and since there are 7 men, the total number of children is 7 men Γ 7 children = 49 children.
Now, add everyone together:
7 men
7 wives
49 children
Total:
7 + 7 + 49 = 63 people.