Someone tell me how to answer this step by step

1. You have to count the boxes that equal the length, width, and height or the prism.
2. The height = 4, length = 5, width = 2
3. Then multiply 2.5 x 4, 2.5 x 5, and 2.5 x 2 in order to get the actual length, height, and width. (1 box = 2.5)
4. The new height = 10, length = 12.5, and the width = 5
5. Now that you have the measurements of the length, width and height now you can plug those numbers into the volume of a rectangular prism formula (l x w x h)
6. So 10 x 12.5 x 5 = 625
The answer is D 625