To get back to doing another sum you need to press the space key, this makes it so you can read the number. You need to press the green flag in order for the calculator to start up. While being as simple as it is, this was actually quite hard to code! Look at the script to see what I mean. When you click on the green flag, you will be prompted to do a basic function, these functions are adding, subtracting and multiplying. If you find out what the hidden extra function is too, you can type that in, too. If you type anything else you will be prompted to type in a valid function, I have used some basic script to do that. Once you're done with that you can enter in a "number 1" and a "number 2". There is a filter making it so you cannot enter word or an invalid sum (mainly putting only zeros in your number, as the answer is always 0). The answer will display for two seconds on the screen, this will probably be slow enough for you to read the number, without taking a minute to be there. I myself have installed an experimental list and click count. You can only read what the code is and what's on there by going into the project, or being me (the feature always displays for me).
All of the coding belongs to myself, if any of my codes resembles are previously made strategy of a filter, I did not intentionally copy from ANY other Scratcher. The image of the calculator you see was omitted in a Google search result. It is not my photograph, but a photograph in the public demain. This makes it free of copyright and other ways the photo might possibly be infringing rights.