Install speedcrunch by entering the following commands in the terminal:
sudo apt update sudo apt install speedcrunch
Description:
High precision calculator
SpeedCrunch is a high precision and high speed calculator. . It's optimized for keyboard use and has advanced features: use of functions, use of variables, result history, and syntax highlighting. It also shows the result as you type. . SpeedCrunch has a very simple interface, so you can start to use it very quickly.
Homepage: http://www.speedcrunch.org/
Version: 0.12.0-3
Section: universe/kde