7 х 8 40 July 8, 2019 16 32 64 128 7 x 8 40 7 8 x 400 8 х 7 )+ 16 =- 40 7 8 x 40 1 8 7 x 8 40 2 7 15 x 40 8 15 7 over 8 x 40 7 х 40