Create a prison using the blocks. For example, a length of 4 blocks, a width of 2 blocks, and a height of 1 block. This creates a prism that contains 8 blocks.
Now, find multiply 1/4 by each measurement to find the size of each measure.
1/4 x 4 = 1 = length
1/4 x 2 = 1/2 = width
1/4 x 1 = 1/4 = height.
Now you have the three measurements, multiply for the volume!
V = l x w x h
V = 1 x 1/2 x 1/4 = 1/8.
Therefore, the rectangular prism has a volume of 1/8 cubic meters!
Hope this helps, let me know if you need anything else! :)