Answer
0. Measuring the side of the box at which the reams of paper are perpendicular.
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1. Dividing the measure of the side against the number of papers contained in the box.
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2. Multiplying the quantity times two
Step-by-step explanation
First, we would have to measure the sides of the box. In case it is a cube, we can measure just one side (as all the sides measure the same). However, if it is a rectangular prism, we would have to measure the perpendicular side of the reams of paper.
Next, we have to divide the measure of the side against the number of papers contained in the box. As we know that one ream of paper is 500, then 5 would be 2500, a quantity that the measure of the side would be divided against.
Finally, we would have calculated the thickness of one sheet. Thus, we would have to multiply that quantity times two to get the measure of 2 sheets.