What improvements can I make in this web project? I need ideas and feedback.

Question

I made a website where you only have to input the value of radius and click submit. Then the program will return the Area and Volume of all the possible shapes whose Area and Volume can be calculated by radius alone (answers will be rounded off to 2 decimal points). I need your suggestions on what I can do to improve this project and make it more useful and look professional. 👇
https://www.sololearn.com/compiler-playground/WlvEn0btJ9yR

Give it a Up if you like it.
By the way, feel free to copy and use the code if you want to.

⭐ If you want to use this site, save the link below and visit it whenever you want to 👇
https://harman-maan42.github.io/Math-Radius-Problem-Solver/

Answer 1

The user interface gui can be more comfortable. For example after submiting the input can be cleared. Using of enter key can be implemented. Feedback for user if the input type is not correct etc.
In addition there can be created a picture which shows the radius in each item, you had calculated.

Answer 2

Use feed for this kind of posts
https://www.sololearn.com/Discuss/3021159/?ref=app

Answer 3

Link is not working