There are 7 girls on a bus. Each girl has 7 backpacks. In each backpack there are 7 big cats. Each big cat has 7 small cats. How many legs are on the bus? The bus driver does not count. The backpacks are on the bus and do not have legs. Wheels on the bus do not count!
YOU MUST EXPLAIN IN WORDS YOUR THINKING AND CALCULATIONS!!!
Good luck :-)
Hint: The answer is a 5 digit number.