Verfo told me about this problem. Well, here it is.
There are 7 girls on a bus.
Each girl has 7 bags.
Each bag has 7 cats.
Each cat has 7 kittens.
How many legs are there on the bus?
What's the answer? Put it in spoiler if you have one.
P.S. There is no bus driver and the bus doesn't have legs.
