4 2 x 5 64 July 8, 2019 16 32 64 128 2 3x 4 2 5 2x 64 4 mũ 2 x 5 64 4 2x 5 64 3x 4 x 5 mũ 2 64 chia 2 mũ 3 4 2 x 5/6