9 2 4 6 1 4 July 8, 2019 16 32 64 128 9 1 4 x 6 1 4 x 2 9 1 4 x 6 1 4 x 2 in cm 9 2 4 minus 6 1 4 1 4 2 6 9 2x (- 4 9 1 4 x 6 1 4 x 2 box
