In this example, we learn that 1 gallon of gasoline costs $3.65. However, we want to know how much 14.2 gallons of gasoline would cost. As each gallon has the same price, we would need to multiply the price by the amount of gallons we need:
$3.65 x 14.2 = $51.83
The closest option to $51.83 would be $56 (estimated price).