Install concalc by entering the following commands in the terminal:
sudo apt update sudo apt install concalc
Description:
console calculator
concalc is a calculator for the Linux console. It is just the parser-algorithm of extcalc packed into a simple console program. You can use it if you need a calculator in your shell. concalc is also able to run scripts written in a C-like programming language.
Homepage: http://extcalc-linux.sourceforge.net/
Version: 0.9.2-2build1
Section: universe/math