Task: Question Answering
Input (English): Problem: a tailor trims 4 feet from opposite edges of a square piece of cloth , and 3 feet from the other two edges . if 120 square feet of cloth remain , what was the length of a side of the original piece of cloth ? 
Options: ['a ) 18', 'b ) 20', 'c ) 24', 'd ) 26', 'e ) 40']
Output (English): a