What does the numbers on the gas pump mean?

The numbers on a gas pump indicate the price per gallon or liter of fuel, as well as the total amount of fuel dispensed and the total cost of the purchase. The price per gallon/liter shows how much you will pay for each unit of fuel, while the total volume dispensed reflects how many gallons or liters you've pumped. The total cost is calculated by multiplying the price per unit by the total volume. Additionally, some pumps may display the octane rating, which indicates the fuel's performance characteristics.