9 2 x 3 7 3 4 July 8, 2019 16 32 64 128 3 2 x 7 3 3 4 9 8 7 9 * x 1 4 2 3 * x 3 4 6 x 7 3 2 x 9 4 3 3 x 3 = 9 9 3/7+2/7
