If one centimeter on the map above equals 29 miles, our vehicle gets 13 miles per gallon of gasoline, and gasoline costs $ 3.99 per gallon, how much will it cost to drive to the ski lodge? To calculate how much it costs to drive to the ski lodge we must first measure the distance on the map in cm and then convert that distance to a dollar value. Start by entering in the measured value in centimeters on the left and then drag the items to the different sections in order to perform the conversion and finally calculate the total gas cost. cm x 5 9 10