Looks like a duplicate of: https://bugs.launchpad.net/gnome-calculator/+bug/1182014
Apparently this has been a problem through Ubuntu 13.04 and 13.10. I also just noticed it when I went from 12.04 to 14.04. -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to gnome-calculator in Ubuntu. https://bugs.launchpad.net/bugs/1316247 Title: Calculator gives wrong answers after undo Status in “gnome-calculator” package in Ubuntu: Confirmed Bug description: On a clean installation of Ubuntu 14.04, 64-bit. Steps to reproduce: 1. Open calculator and type "5000/60" followed by <Enter>. The calculator produces the right answer, 83.333... 2. Type "/60" followed by <Enter> to divide by 60 again. The calculator again produces the right answer, 1.388... 3. Press <ctrl>-Z to undo the last calculation. 4. Press <backspace> twice to delete the last "60". 5. Type "12" followed by <Enter>, to divide by 12 instead. The calculator gives me the wrong answer!!! See attached screenshot. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-calculator/+bug/1316247/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp