drupal block form
 

i'm trying to create a block in drupal that performs calculations based on a variable from another part of the page, this much i can do but i also need to accept user input for 2 other values, how can i create a form that takes the input then displays the results in the same block?

I don't know if you would be able to do it with HTML forms - there might be a need to pass POST (or GET) data and that might require re-loading the page. Do not hold me to this, as I have not done any sort of in-depth HTML+PHP in years.

Alternatively, you could use JavaScript.