It's a nice start for fun but do you intend to improve this project? I've tried it out of your respect but it's not really something that I'll check tomorrow. If you improve it, I think it will be very cool thing. Anyways, I suggest you to use input type = "number" instead of "text", this way, users won't accidentally type an alphabet. You can also use flexbox to make it responsive. At the moment it only opens on desktop computers, it doesn't work in smartphones. Also, result generation time takes more than 5 seconds, which is not really comfortable. The more instant it is, the better. I wish you a good luck.