Answer :
Just convert 3 1/4 gallons into liters:
3 1/4 gal 3.8 liters
------------ * ------------- = 3.25(3.8) liters = 12.35. 12 L is the best estimate.
1 1 gal
3 1/4 gal 3.8 liters
------------ * ------------- = 3.25(3.8) liters = 12.35. 12 L is the best estimate.
1 1 gal