The area of a rectangle is calculated by the product of the length and the width of the rectangle. We calculate as follows:
Area = 12 3/4 square inches = L x W
12 3/4 square inches = L x 2 1/8 inches
L = 51/4 * 8/17
L = 6 inches
Area = 12 3/4 square inches = L x W
12 3/4 square inches = L x 2 1/10 inches
L = 51/4 * 10/21
L = 255/7 inches