2 3 x 81 16 July 8, 2019 16 32 64 128 3 2 3x 16 81 2 3 x *( 3 2 2x 81 16 2x 3 x 2 162x 81 2x 3 x 2 then 16x4 81 x4 4 9 x 2 3 16 81 2 81×3 4 2 3/8 x 16
