>> (I've never tried this extensively, but I would suggest that it 
>> probably requires a little forethought before you start the 
>> calculation...)
> 
> Not too much. If you have the equation written down...

I was thinking more if you're just casually throwing numbers around, and 
you suddenly realise that you'd like to use the number on the top of the 
stack as the *denominator*, not the numerator, or something like that. 
If you know before hand exactly what computation you want to perform 
then yes it's quite easy.

-- 
http://blog.orphi.me.uk/
http://www.zazzle.com/MathematicalOrchid*

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