9 9 x 9 8 July 8, 2019 16 32 64 128 9 x 9 81 9 x 9 80 9 x 9 88 9 9 x 8 7 9 x 9 82 9 2 x 9 6 9 8 9 x 8 = 9 × 9 9 x9=
