4 X 125 X 25 X 8 2 X 8 X 50 X 25 X 125 2 X 3 X 4 X 5 X 50 X 25 25 X 20 X 125 X 8 - 8 X 20 X 5 X 125

Bài 3: Tính nhanh: 4 x 125 x 25 x 8 2 x 8 x 50 x 25 x 125 2 x 3 x 4 x 5 x 50 x 25 25 x 20 x 125 x 8 - 8 x 20 x 5 x 125