WMIC GET /Value

I am attempting to use WMIC to obtain the value ONLY for a program like:
wmic product "Symantec Endpoint Protection" get identifyingnumber /value

But this command gives me "identifyingnumber=XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX"

How do I get just the value without the "identifyingnumber" in its return.  My goal is to take that value and attach it to another script like so.

msiexec.exe /q/x %Identifyingnumber%