Use https://turbowarp.org/1002459615/editor?fps=250&turbo&hqpen How to calculate Pi with a dart board, some darts, and a whole lot of spare time! Note: This project will take VERY VERY LONG to finish. Expect to spend 8 months, 2 weeks, and 6 days waiting. (Without turbo mode :D) Edit: Never mind, you can just use Turbo Mode to speed up the process! Just hold SHIFT and click the green flag.
WARNING: It might lock your browser. IT WILL LAG THE PC A LOT.