When you can't find a calculator...

If you're using a JavaScript enabled version of Netscape Navigator, you can use it instead of your calculator to perform even very complex calculations. You don't have to go to a web site with an online calculator to do this. All you have to do is:

• Type javascript:eval( ) in the url and press ENTER
  
  For example, to add 1 and 3 type:
  
  javascript:eval( 1 + 3 )
  
  and press ENTER

Reference:

http://www.chami.com/tips/javascript/