Guido's calculator, like many of ours, is the interactive Python prompt. There is a good reason Python 3000 will default to infinite precision floating point calculations (or whatever they call it) ... Guido joined Google! Working at Google makes numbers completely meaningless to you. About two months in, it hits you, your brains melt out your ears, and the number of stars in the universe isn't really all that big a number anymore. Python's front man is on Google's payroll now, so Python must be able to handle the need to calculate petabytes and nanoseconds.