The problem was:
dconf read /org/gnome/desktop/input-sources/xkb-options
['keypad:future']
You can test the pain yourself with this command:
dconf write /org/gnome/desktop/input-sources/xkb-options "['keypad:future']"
And then try to use the calculator.
Finally found a solution: askubuntu. com/questions/ 598099/ numpad- buttons- going-weird
http://
dconf reset /org/gnome/ desktop/ input-sources/ xkb-options
or
gsettings reset org.gnome. desktop. input-sources xkb-options
The problem was: desktop/ input-sources/ xkb-options desktop/ input-sources/ xkb-options "['keypad:future']"
dconf read /org/gnome/
['keypad:future']
You can test the pain yourself with this command:
dconf write /org/gnome/
And then try to use the calculator.