Based on the information given about the fraction, the number of boxes that are needed will be 171 boxes.
From the information, it was stated that headphones at a factory are packed into small boxes measuring one-third cubic foot.
Therefore, the number of boxes of headphones that can fill a cargo truck measuring 57 cubic feet will be 57 divided by 1/3.
= 57 × 3
= 171
Therefore, 171 boxes are needed.
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