If one gallon of paint covers 825 sq. ft., how much paint is needed to cover 2640 sq. ft.

3.2 gallons of paint is needed since 2640 divided by 825 = 3.2 

The answer is 4 gallons because you need enough paint to cover the space and when you divide 2640 and 825 it gives you 3.2121212121 but like i said before you need enough paint to cover the space