Yes. One gallon of petrol in the UK is equal to about 4.546 liters. (In the US, one gallon of gasoline is equal to about 3.785 liters.)
In the UK, about 4.546 liters per gallon. In the US, about 3.785 liters for one US gallon.
One UK gallon of petrol = 4.55 L
2642 gallons = 1 liter (rounded at bit)
3.78 L