The height of the rectangular parallelepiped is 25 cm, the width is 80% of the height

The height of the rectangular parallelepiped is 25 cm, the width is 80% of the height, and the length is 4/5 of the height. Find the volume of this parallelepiped.

Let’s solve this task by action.
1) 25 * 0.8 = 20 centimeters – the width of the rectangular parallelepiped, since it is 80% of the height, and the height is 25 centimeters;
2) 25 * 4/5 = (25 * 4) / 5 = (5 * 4) / 1 = 20/1 = 20 centimeters – the length of the rectangular parallelepiped, since it is 4/5 of the height, and the height is 25 centimeters;
3) 25 * 20 * 20 = 25 * 400 = 10,000 cubic centimeters – the volume of a rectangular parallelepiped with a height of 25 centimeters, a width of 20 centimeters and a length of 20 centimeters.
Answer: 10,000 cubic centimeters.