How do you change a PDF file into a .doc file?

I need to know the fast and easiest way.. who can help me correctly, will get 10 points~!How do you change a PDF file into a .doc file?
There r 2 ways 1. As others told download the converter and convert it. 2.The simple way is open the pdf file copy the content and paste it in the word and for images importe it in word. Thats it.How do you change a PDF file into a .doc file?
I personnally use Adobe Acrobat 7 proffessional, but there are other applications also, if u want a free application then there is one ';PDF to DOC'; you can download it from www.download.com
You are not supposed to be able to, if you do a google search I am sure you will find third party apps to do this.
try this

http://www.download.com/Free-PDF-To-Word