Install wmcalc by entering the following commands in the terminal:
sudo apt update sudo apt install wmcalc
Description:
dockable calculator application
Wmcalc is a small calculator meant for the WindowMaker dock or Afterstep Wharf. It is a simple calculator with basic functions and memory slots, and can launch any external application for more complex calculations.
Homepage: http://windowmaker.org/dockapps/?name=wmcalc
Version: 0.6-1build1
Section: universe/x11