Sureley you jest: 1/3 of a yard equals 1 foot, because three feet equals one yard. (Therefore 5 yards equals 15 feet + 1/3rd of a yard which equals 1 foot will equal 16 feet because 15 feet plus one foot equals 16 feet,)

1 foot equals 12 inches; 171 inches equals 14 feet 3 inches. Or to leave the answer entirely in feet you can say that 171 inches equals 14 1/4 feet or 14.25 feet.