Excel Internet Interactiveness???

Hello,
I was wondering if there is a way to use Excel within a website, i.e.; if I have a page that is to collect information from a visitor. After they have entered thier information, a report is made from formulas within an Excel document that I have created for them to view on another page and then can be saved as an Excel document under thier name to be viewed again at a later date. Forgive me if this is a stupid question.....I am pretty new to having a website......... Thanks for any and all help!!!