3 х 1 81 July 8, 2019 16 32 64 128 3 x 1 81 3 х 8 1 81 3 4 x 1 81 3 3х 7 1 81 3 x 9 x 1 810 0 3 х 2 5х 2 1 81 1 3 х 7 1 81 3 x 81 1 2