Similarly, we can know: (3, 6, 6) (3, 9, 9) (3, 3, 9) (3, 6, 9) (30, 3, 3) (369, 693, 309) ... and so on.
In short, all three sides of a cuboid are integer multiples of 3, and a cube with a side length of 3 cm can always hold these complete cuboids!