Package gdcalc

https://gitlab.com/wef/gdcalc

gdcalc is a financial, statistics, scientific and programmers
calculator for gtk+-based under Unix and Linux.

It has both Algebraic notation (ie. conventional, TI or Casio-like)
and Reverse Polish Notation (HP-style).

To customise for fonts & colours:

mkdir ~/.config/gdcalc
cp /etc/gdcalc/gdcalc.css ~/.config/gdcalc/

This package includes the original dcalc for curses (Unix console)

If you want to know more about RPN calculators (and why they are more
intuitive than algebraic calculators with their = sign) take a look at
www.hpcalc.org

Version: 3.4