Install gnome-calculator by entering the following commands in the terminal:
sudo apt update sudo apt install gnome-calculator
Description:
GNOME desktop calculator
The GNOME calculator is a powerful graphical calculator with financial, logical and scientific modes. It uses a multiple precision package to do its arithmetic to give a high degree of accuracy.
Homepage: https://wiki.gnome.org/Apps/Calculator
Version: 1:3.28.1-1ubuntu1
Section: math