Task: Question Answering
Input (English): Problem: a tailor trims 6 feet from opposite edges of a square piece of cloth, and 5 feet from the other two edges. if 80 square feet of cloth remain, what was the length of a side of the original piece of cloth ?
Options: a. 16, b. 18, c. 20, d. 24, e. 32
Output (English): c