15 3 х 7 July 8, 2019 16 32 64 128 15 3 x 7 15 3 x 7 2 15 x 3 7x 3 15 x 7 14 15 3 4 x 7 15 3 5 x 7 15 3 8 x 7 3 15 x 10 7 /7/15 х 3
