------
## 最终结论
```python
def lateralsurface_cuboid(length, width, height):
    return 2 * height * (length + width)

assert lateralsurface_cuboid(8,5,6) == 156
assert lateralsurface_cuboid(7,9,10) == 320
assert lateralsurface_cuboid(10,20,30) == 1800
```