docs: improve vol_cuboid docstring with Wikipedia reference and math formula

Author: Procodcj

maths/volume.py

@@ -174,7 +174,9 @@ def vol_cuboid(width: float, height: float, length: float) -> float:
     """
     Calculate the Volume of a Cuboid.
 
-    :return: multiple of `width`, `length` and `height`
+    Wikipedia reference: https://en.wikipedia.org/wiki/Cuboid
+
+    :return: :math:`width \cdot height \cdot length`
 
     >>> vol_cuboid(1, 1, 1)
     1.0