Pint allows calculations involving unitsAn example of how to start up and use Pint is attached as code to the screenshot. You can view it by clicking on the </> Code button to the left of the screenshot, then clicking on the Jupyter notebook  PintTest.ipynb .  To run this particular notebook, however, you must first download the code to your own computer, as Pint is not included in the current version of Authorea's python webserver.