Microsoft Calculator Plus - Not the App Store Version
There are lots of people, myself included, who do not really care for the Windows 10 built-in calculator app nor for the App Store Calculator Plus app.
I always preferred, and still do prefer, the Microsoft Calculator that I was familiar with from the Windows 7 days. That is still downloadable from Microsoft on the page for the Microsoft Calculator Plus program [which would now be called a desktop app, and is if I search for it now that it's installed on my machine].
If you use the click-through link I provided you can download the MSI installer for the program. If you've wanted to return to using "good, old-fashioned calculator with its classic, scientific, and conversion views now you can.
Here is a test to find out whether your mission in life is complete. If you’re alive, it isn’t.
~ Lauren Bacall