Write a program that will read the number of LITERS of gasoline consumed by the user's car, and the number of MILES traveled by the car.

The program will then output the number of MILES PER GALLON that the car delivered.

Your program should allow the user to REPEAT this calculation.

Define a function to compute the number of miles per gallon.

double mpg(double miles, double liters);

Take input data for TWO cars and output the number of miles per gallon delivered by EACH car.
Your program must announce which car has the better fuel efficiency.

Hint: LITER =  0.264179 GALON.