13 x 58 x 4 32 x 26 July 8, 2019 16 32 64 128 13 x 58 x 4 32 x 26 x 2 52 10 Tính nhanh 13 x 58 x 4 32 x 26 x 2 52 x 13 x 52 13 3/4 x 19
