The prototype! It works with all 4 basic operations, decimals, and it uses order of operations! Yay! I'm still debating adding a parentheses feature and changing the interface/button layout, but let's focus on other things for now. Also, since I'm using stamps instead of clones, there's only a delete all button instead of the user being able to delete individual numbers, but since the calc is so small anyway, I figure that's not much of a problem.
Please report bugs, I want to make this as polished as possible!! To be fixed: (I will look into later) Add delete previous # button?? Negative numbers/parentheses? Button layout?? Glow effect around buttons when pressed? "Text predictions" (current awnser appears in display while user is entering in the equation, like in mobile calcs)??