Thanks for the compliments! I'll check out the chalk program - looks neat.
Yeah, Calculor does have one issue I never figured out how to solve - when you divide a certain way, it displays the trailing zeroes. I've done all sorts of things to fix that but never hit on the right solution. And I haven't looked at the code in forever, so I don't know if I'll ever see the time to fix it. Life's like that. One moment's interests are not the same years later.