2 3 x 4 9 x 8 27 July 8, 2019 16 32 64 128 9 4 x *( 8 27 x 1 2 3 27 *( 4 9 x 30 *( 2 3 x 8 0 (3 9 − 2 4) · 8 2 9 x 8 = 2x 9