Admin Forum:Creating page titles with a slash in

How do you create a page title with the / (slash) character in the name without it becoming a sub page ? i.e. example 2/21 actualy creates the subpage /21 of example 2 or is the only alternative to use the form example 2-21 instead and create redirects from the subpage ? - 88.104.134.191 17:37, March 27, 2012 (UTC)