5th Grade Math Question

Driver not included.

Good luck with this and have fun! This is a 5th grade math problem.  If you can't stand word math problems, just delete now. This is not a trick question.  This is a real math problem so don't say that a bus has no legs.

There are 7 girls in a bus

Each girl has 7 backpacks

In each backpack, there are 7 big cats

For every big cat there are 7 little cats

Question: How many legs are there in the bus?

(remember, for this problem the driver is not included)

If you respond with your answer I'll let you know if you are correct.