3 5 7 23 July 8, 2019 16 32 64 128 3 5 6 * 7 23 3 5 6 х 7 23 3 5 6 х 1 7 23 1 3 5 7 23 1 3 5 7 23 is equal to 2 3 5 7 23 3 5 x 7 23 7 (- 5 )+ 4 3 )=- 23