Gallons of gas = Distance (in miles) / Miles per gallon (MPG)
In this case, the distance is 488 miles and the MPG is 26 MPG.
Gallons of gas = 488 miles / 26 MPG
Gallons of gas ≈ 18.77 gallons
Therefore, you would need approximately 18.77 gallons of gas to travel 488 miles in a car that gets 26 MPG.