the length of a rectangle is 4 times its width . if the width of the rectangle is 5 inches , what is the rectangle ' s area , in square inches ?
"if the width is 5 in and the length is 4 times the width , then the length is 4 * 5 = 20 in the area is given by 5 * 20 = 100 square inches correct answer c"
rectangle_area(5, multiply(4, 5))