send query by using a textbox of html to python(django)

i work on a project in which i could send query by using a textbox of html to django .then django can process on this query and assign the return value as list in html.

now, i ask the following question:

 how can we send a number from text box of html to python(django) and after that django multiply this output number in 3 and return this number as list in html

tnx

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