What is 0.1 + 0.7?
Well obviously it is[masked]
At least if you believe IEEE 754.
If you find this as annoying as Petrus does, come and find out how he solves this and other interesting numerical problems using Haskell.
* 6pm ~ 6:45pm: drinks and snacks to keep us functional
* 6:45pm: talk
* 8pm: lights out