1 Liter equals 3.78 gallon so 0.26 liters are in 1 gallon.
one liter = 0.264172052 US gallons
1 US gallon = 3.785 litres; 600 x 3.785 = 2,271 litres
340 liters = 89.82 US gallons.
1.75 liters = 0.4623 US gallons.