3 4 6 x 7 13 July 8, 2019 16 32 64 128 4 x 3 ))/ 6 =( 2 x 7 ))/ 13 3 3 4 6 x 13 18 y 6 3/4 x 4 6 3/4 x 3 6 3/4 x 4 1/2
