TG comic: math help

How many times has this happened to you? Ok, maybe never but I thought I'd ask. I enjoyed making this TG caption and to where it lead. Usually I start a story with only a rough idea of where I want it to go. As I was putting it all together the idea of the first twist came to mind and as I was finishing the TG comic, I came up with the second twist and had to add a couple of panels to top it off. Enjoy the TG comic!