The general idea
This app was a quick exercise to practice building a native Android app and using an api.
Just some fun
This app is a bit nonsensical, let me be the first to admit that, but it was quite fun to make. Making a calculator, albeit a tiny bit unoriginal, proved to be a nice way to practice making an Android app. I did not follow a tutorial, so figuring out how to deal with each possible outcome or situation was a good exercise.
The addition of showing a random fact about the result, was just an idea which allowed me to use an API. I used a very simple API without API key, just to get the fundamentals right.