We will investigate how to use the mileage meter of a car to determine the amount of distance a car can travel per given fuel.
Mileage is a economic performance parameter of a car that gives the fuel economy. It is usually expressed as a ratio of:

The mileage of a car is given as follows:

We can say that this car can travel 29.7 miles per gallon on highway.
We now stop at the petrol station for re-fueling. We fuel up the car to:

We need to determine the distance that this car can travel for the amount of re-fueling. This is where we can use the mileage to determine the distance the car can travel as follows:

Plug in the respective quantitites and solve for the distance that the car can travel as follows:

For the amount of re-fueling the distance travelled is 310.365 miles