Lyricee

Hi Guys...this is the first time I've posted on one of these although have been looking for the name of this movie for a very long time and am REALLY hoping someone can help. The plot from what I can remember was about a lad who is taken from the normal world into a fantasy world (similar I think but NOT The Pagemaster although I think it may shift from motion picture to animation in the same manner) he makes his way through this world meeting a number of character which I think included a talking wolf and a ranger mercenary type character until at the end of the story he fights a multi-headed dragon which he defeats by quoting large, possibly mathematically related words.....can someone please shed some light as I am starting to think it may have been all in my head!!!