For every £1 of petrol (gas), we pay 60p in tax.
A litre of petrol costs, say, £1.10 per litre. There are 3.78541178 litres to one US gallon. So that's £1.10 x 3.78541178 = £4.16 per US gallon. At the moment £1 = $1.52 so if you paid UK prices for 1 US gallon of gas, that would cost you $6.33 and $3.80 of that would go in taxation. How much is 1 US gallon of petrol (gas)?