interesting calculator behavior!?

[Eduard Hoenkamp]

I happened upon the following oddity using the OSX calculator (the 
brushed metal one under Applications). This happens in 'advanced' 
mode.

112*46 ->    5152
but:
112*4.6 ->   515.1999999999999
which should have been 515.2 obviously (and which it does produce in 
'basic' mode). It reminded me of the Intel processor bug, and I hope 
it tickles someone's curiosity and/or imagination. Eduard.