Can i make more mob spawns from Coffings

Guyz i have 1 question can i make more mob from destroyed 1 coffing
Exemple:
1 coffing=11 Argols can i make??:
1 coffing=33 Argols can i set up number mobs from destroyed coffings ??

dunno if that's server sided... :confused:
but would be nice if there is a possibility to change it... :cool:

Yes would be very very nice :) then maybe some1 know how doo that .