Depending on the state and country, cars can have 1 or 2 license plates on them. The one mandatory is in the back. In some places, the cars also have a license plate in the front of the car.
So, since the answer is either 1 or 2, the range for that answer is under 10... so it's a single digit... making it a measure in ones.
The number of tires on a car is also measured in ones.
First you will need to convert the mixed number(s) to an improper fraction. Then to multiply you multiply the numerators and denominators straight across. Hope this helps!