One US gallon = 3.785 liters.
Fords 3.8 liter is 232 cubic inches
231 mm is 9.1 inches.
231 pounds = 104.779837 kilograms
It depends what is in the 231 quarts.
33 weeks in 231 days
231 miles is 371.76 kilometers.
231 pounds = 16.5 stone
231/36 = 6.416 yards
231 ÷ 7 = 33
231 ÷ 7 = 33
231 inches = 19.25 feet.