4 7 3 2 3 x 4 7 July 8, 2019 16 32 64 128 4 3 7 x 4 7 8 3 2 7 4 7 2 3 ) ( x 1 2 )= 8 7 4 3 − 7 3 2 x 4 3 )+ x 7 4 2x 4 4 7×3 2 4 7 - 3 7
