Hello, I am new here

I just downloaded a 13-GB torrent, a 3-set DVD. And I open up the folders (Disc1, Disc2, etc) And I see a RAR file (with an ISO file inside) and a bunch of other files with extension *.r** (** being numbers.) Do I burn the ISO? I have not too many DVDs and don't want to waste them! (Call me noob..)
Thanks for help in advance.
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