In the question, it is already given that Evan,s car gets approximately 20 miles per gallon.
So In 1 gallon of gas, Evans car gets approximately = 20 miles.
We also know that
1 mile = 5280 foot
20 miles = 105600 foot
1 gallon = 8 pints
Then
we come to know that
In 8 pints Evan's car travels approximately = 105600 feet
In 1 pint Evan's car travels approximately = 105600/8 feet
= 13200 feet
So Evan's car will travel 13200 feet in 1 pint of gas.