A rectangular prism is completely packed with 200 cubes of edge length fraction 1 over 5 inch, without any gap or overlap. Which of these best describes the volume of this rectangular prism?

1 unit cube and 15 smaller cubes of volume fraction 1 over 125 cubic inch each
1 unit cube and 75 smaller cubes of volume fraction 1 over 125 cubic inch each
7 unit cubes and 25 smaller cubes of volume fraction 1 over 125 cubic inch each
7 unit cubes and 125 smaller cubes of volume fraction 1 over 125 cubic inch each

First answer gets Brainliest