3 7 х 28 July 8, 2019 16 32 64 128 3 7 х 28 33 3 7 x 28 3 7 x 280 3 7 x 28 1 3 7 x 28 33 3 over 7 x 28 2 3 7 x 28 3 x 7 )+ 4 28 2x 7 х 1 3 * 7 х 28 3 7 x 28 9