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Cube method:
Since the rectangular prism is made up of 4 cubes that are 1/5 inch on the side, we can find the total volume by finding the volume of one cube and then multiplying by 4.
Volume of one cube = (1/5)^3 = 1/125 cubic inches
Total volume = 1/125 * 4 = 4/125 = 1/31.25 cubic inches
Therefore, the volume of the right rectangular prism is 1/31.25 cubic inches.