If gasoline costs 2.50 per gallon it will cost about this much in liters?

To convert the price of gasoline from dollars per gallon to dollars per liter, we need to multiply the price per gallon by the conversion factor of 3.7854 liters per gallon.

So, if gasoline costs $2.50 per gallon, it will cost about $2.50 x 3.7854 = $9.46 per liter.