I was bored so I decided to find a random game from the play store,
sadly for all of us I ended up playing "Calculator: The Game".
I really got into it, and I actually loved it, that's why I decided to write a calculator for the calculator game :)
Anyways, I haven't checked out the sequel yet, but if I do I will also include that.
You are free to add more levels from the game, just don't edit the solver,
mainly because I enjoy working on the solver.