1. Calculate the number of gallons needed:
Gallons = Distance / Fuel Efficiency
= 659 miles / 25 MPG
≈ 26.36 gallons
2. Calculate the total gas cost:
Gas Cost = Gallons * Gas Price
= 26.36 gallons * $4 per gallon
≈ $105.44
Therefore, it will cost approximately $105.44 in gas to drive 659 miles with the given fuel efficiency and gas price.