Hey guys i don't understand will you guys me

OK, I'm guessing ur name is Zachary? 
So, Zachary, this is volume. You need to find the volume of the figure. But the question is saying that the volume is already found - 1/36. You just gotta find the measurements. 
In a cuboid, there are two squares. The length of the sides of the cubes are always the same - because it's squares. So, you just need to find a suitable measurements for the two labled sides of the square. Then you need to find another measurement for the other side - the longer one. 
To check if you are corrects or not, just add all the labeled sides up. If your answer is 1/36, then you are correct.

The amount used= 13.04- 1.9 = 11.14