I have seen 2 approaches about how you would go about calculating the total # of gas station in a country.
Approach A is to look at  Total # of cars in that country /  # of cars that can pass through a gas station per day
Approach B is to look at  Total amount of cars * how many liters per day they need to refill on average / Liters Capacity per gas station (all pumps together)
Which approach makes more sense to you and why? I prefer A.