I am appaled at that photoshop of a dollar bill. C'mon, if you're going to do it, do it right. That, and Bill Gates had nothing to do with pi at all. Not in the least. See now, I did my own photoshop way before I saw this one, and I chose to put Archimedes on it, because for a couple thousand years, he had the only accurate way of deriving the digits of pi. I also used a font that was specificially designed to look like the one on currency. So here it is, marvel at it's beauty: