4 6 x 9 5 6 9 x 120 July 8, 2019 16 32 64 128 4 mũ 6 x 9 mũ 5 6 mũ 9 x 120 4 6 x 9 5 6 9 x 120 8 4 x 3 12 6 11 9 x 4 / 6 4 + 4 = 6
