David wants to paint the walls in his bedroom. The floor is covered by a carpet. The ceiling is tall. He selects a paint that will cover per quart and per gallon. How much paint should he buy?

A box is 5 inches long, 5 inches wide, and 4 inches tall. What is the surface area of the box?

What is the surface area of a rectangular brick with a length of 12 in, a width of 8 in, and a height of 6 in?