Publish Excel to a web page
 

How do I publish a sheet as a webpage, but not lose all the formatting, and
only have certain cells available for the end user to input numbers?

Its a simple math page, with detailed instructions that they end user needs,
and it outputs a final value for them. When I try to publish it with "added
interactivity" it makes the webpage smaller, and messes up the formatting. Is
there a way to get around this, or another application I could use?