This morning's petrol prices in Fort Augustus, along the lovely, if sometimes treacherous A82, in the Highlands of Scotland:
That's one pound thirty-six point nine per liter for regular. Ahem, per liter. That's a pretty fair average of the fifteen or so stations I sampled this morning. To make up one US gallon, you'll need 3.785 liters. One liter of petrol will set you back about $2.15 USD - certainly not the worst exchange rate I've seen - and you'll need 3.7854 of them to make a US gallon.
Your tab for one gallon of gas? About $8.13 USD. Enjoy!
Thus spake the rabbit.