Human:

Girls: 7 x 2 = 14

Total: 14 human legs


Animal:

Big cats: 7 x 7 x7 = 343 big cats x 4 legs = 1372 legs
lil cats: 343 x 7 = 2401 small cats x 4 legs = 9604 legs

Total Animal legs = 10976

simple math problem and people takes things too complicated.

Total number is 10,990.