What in the world is that supposed to prove? Let's see you do that in your head. Tell it to use code if you want an exact answer. It should do that automatic

What in the world is that supposed to prove? Let's see you do that in your head. Tell it to use code if you want an exact answer. It should do that automatically, of course, and obviously it eventually will, but jeez, that's not a bad Fermi guess for something that wasn't designed to attempt such problems.