2 x 6 2 x 9 4 5 1 July 8, 2019 16 32 64 128 2 12 x 3 5 4 6 x 9 2 2 x 6 9 2 5 x 18 4 2 2 x 6 8 2 x 9 / 6 2 x 2 5