May I ask how I can let users fill in the data on my website, and then calculate it by other websites’ computing tools, and finally return the results to my website
You can use fetch and http-functions depends on your needs.
See:
https://www.wix.com/velo/reference/wix-fetch
Can you explain it in more detail? I don’t know much about the code
First you’ll have to explain in much more details what you’re trying to do.
There is another website that requires the user to fill in a form, calculate according to the data content of the form, and return the result to the user. Now I want to put this function on the Wix website, how should I do?
Please elaborate. It’s hard to understand the flow from your short answer.