18 7 2 5 * 4 July 8, 2019 16 32 64 128 18 x 7 2 4 5 2 8х 7 )= 18 4 5 4х 2 8x 7 )= 18 4 5 4x 7 12x 5 18 2 4 9 18 2 5 minus 12 4 7 18 2 4x 7 )+ 5 18 /( 5 4 x5 2 7 2
