10990?
LOL, I don't KNOW!!!
DING DING DING DING!!!! We have a winner. Very good young 01gixxerJim!!
You are now promoted to the 6th grade...
Here is the answer:
7 girls each carrying 7 backpacks= 49 backpacks
7 big cats per backpack=343
7 little cat for every big cat=2401
7 girl= 14 legs
big cats =1372 legs
little cats=9604 legs
for a total of=10990 legs