In article <mailman.1734.1341295784.4697.python-l...@python.org>, Dennis Lee Bieber <wlfr...@ix.netcom.com> wrote:
> On 03 Jul 2012 04:11:22 GMT, Steven D'Aprano > <steve+comp.lang.pyt...@pearwood.info> declaimed the following in > gmane.comp.python.general: > > > > One of my favourites is the league, which in the Middle Ages was actually > > defined as the distance that a man, or a horse, could walk in an hour. > > From the "Explanatory Supplement to the Astronomical Almanac" [1992 > University Science Books], Table 15.15, the speed of light is > > 1.80261750E12 furlongs/fortnight And sure enough, that's what units says: $ units 500 units, 54 prefixes You have: c You want: furlongs/fortnight * 1.8026175e+12 / 5.5474886e-13 -- http://mail.python.org/mailman/listinfo/python-list