7 х 3 9 July 8, 2019 16 32 64 128 7 x 3 9 7 x 3 9 14 7 x 3 9x 7 3 x 9 2 7 3 x 9 8 7 3 x 9 5 7 3 x 9 4 X 7 9x 3 6 1 7 x 3 9 9 7 х 3 )= 5 6х 7 х 3
