The surface area S , of a right rectangular prism with length l , width w ,and height h can be found using the formula below S=2(lw + wh + hl)What is the surface area in square inches of a prism with a length of 12 inches a width of 9 inches, and a height of 2 inches?

First, replace all variables with the given values.
12(9) + 9(2) + 2(12) 
This should then equal 150, then the formula says to multiply this answer by 2. Doing so, should give a final answer of 300.