title: How to make an input calculator for custom equation?
body: <p>I have the equation: ((A x B) - (C x D)) / (C - B)</p>
  
  <p>I want to make a calculator that looks something like this: </p>
  
  <p><a href="https://i.stack.imgur.com/K5T1F.png" rel="nofollow noreferrer">https://i.stack.imgur.com/K5T1F.png</a></p>
  
  <p>That screenshot is something I edited from another website and adjusted it to what I want the final product to look similar too. Basically the user types in their numbers in the boxes and presses the answer button to reveal the answer. (to the right of the answer button) </p>
  
  <p>I don't necessarily want someone to do this for me, because it might be difficult, but I want to learn how it is done. Like I said, I have edited a code from another website: edit: I cant post more then 2 links, but it looks very much like the screenshot.</p>
  
  <p>I really don't know how else to do this and I want to learn how to make a "calculator" like this. You type in "A,B,C,D" in the boxes and it solves it for you. I have created this program in Python but I don't know how to make it turn into what I want it to look like. Here is a link to the python code I and a friend made: <a href="https://repl.it/FQJu/2" rel="nofollow noreferrer">https://repl.it/FQJu/2</a> </p>
  
  <p>I will try and respond to comments, thanks! also please note, I am a noobie at this stuff.</p>