According to the meaning of the question, the cuboid has no cover, and five rectangular areas are found:120 * 60 * 2+60 * 80 * 2+120 * 80 is the rectangular area. That is, how much glass was used? 3360 square decimeters. How much water can be filled is equal to the volume of a cuboid, and the length multiplied by the width multiplied by the height is 120*60*80 equal to 57600 cubic decimeters (hint: the calculation unit should be changed to decimeters).