3 1 6 x 9 7 8 July 8, 2019 16 32 64 128 5 6 x 9 )+ 3 4 x 1 )- 7 9 8 1 2 3 4 x 6 7 8 9 3 x 3 = 9 6 3/4 x 1 7/9 6 3/4 x 1 9/39 6 3×1 8