[GiNaC-list] How can I get the values of the solved vars from the returned expression from lsolve?

Hi I stumbled across this incredibly useful library and I wanted to use the lsolve function. I was reading the tutorial pdf to figure out how to use it. So from lsolve i end up with an expression like: *{a==3,b==4}

*

I was wondering how I could get a value of the a and b symbols from this? I would ideally like to store them in an int to use in another library. I have been looking for an answer for a while so I would really appreciate if anyone knows? I could parse it like a string but Im assuming there is a better way? Thank you for your time, Zach