5 7 x 9 20 July 8, 2019 16 32 64 128 7 8 5 6 x 9 20 5 8 25 9 7 x 7 1 20 7 8x 5 x 9 )= 20x 1 5 6 7 * 9 x * 5 27 9 20 5 x 7 = 35 9 x 5/7