Could someone do a calculation on a real HP-21?

[brickviking]

And here I was thinking I was strange for wanting a second fx-9750gII, this one to be left unaltered (i.e. not 9860-ised); or a more modern TI. My "hobby"s rather constrained by the fact I've got no real disposable cash, so I use what little I do get for justifying my other hobby, flight simulation. But that's another tale.

(Post 325)