4 x 9 6 12 July 8, 2019 16 32 64 128 1 5 4 x 6 9 x 12 9 4 x 9 6 12 2 x 3 4 6 x 9 5 6 9 x 120 1 8 12 4 x 6 9 4x 9 =- 6 12x 9 x 8 =
