Green flag and space at the same time to start. It may take a few tries, but it'll start eventually. If you don't time it right, the project will keep going but you cannot start it. I made a calculator that gets EVERY SINGLE QUESTION ON EARTH RIGHT. It also can get into the negatives with subtraction if you want ;)
I made this project June 2, 2019. I was able to find it in my stuff and fixed some bugs, also added division. I hope somebody sees this, because this is trending page coding.