The answer depends on the lengths of individual cars which varies from model to model.
9*6 = 54 sq inches
How long is a piece of string?
2,700 feet
Insurance companies will be happy to insure as many cars as you want, as long as you are willing to pay the insurance premium.
depends how long the car is
There is no limit as long as you have enough money.
"This many cars".
Depends how long the car is
Many of them have long life parts. They are economical. They are ecologically better.
It depends on how long each car is!
How many cars does he have? is correctHow many cars does he has? is incorrect
4 ft 9 inches is 57 inches.