Do maths like a normal person. Type whatever you want and the app smartly figures it out. You can even plug those answers into future equations and if that answer changes, so do the equations.
Behold! Third-party repositories are usually not verified by others. Follow these instructions only if you trust the owner of the repository and developer of the software. Opt for only one installation option if multiple are offered for your system. Use at your own risk!
Add a repository for elementary version 0.3 to install the software, by entering the following commands in a terminal:
sudo apt-add-repository ppa:nasc-team/daily && sudo apt-get update sudo apt-get install nasc