How many gas stations (or coffee shops, etc) do you think there are in the U.S.?

With this question, we’re looking for good critical thinking skills. It’s not okay to just guess a number with no explanation or to say they would “Google” it. You want the candidate to have a process for getting to their guess, no matter how far off it is. There are this many gas stations in my town, I would guess this many towns in my state….