[Asterisk-Users] Dialing part of the extension

[Cosmin Prund]

I know this one must be easy but I'm an newbye so please help.
In my extensions.conf I want to have a line like:

Exten => 9XXXXXX,1,Dial(Zap/4/${SOMETHING},40,r)

Ie: I want to dial all the XXX-es, but not the 9;
How do I do that? What do I write in place of ${SOMETHING}? Navigating the
wiki didn't provide any usefull advice...

Thanks.