preg_match_all javascript code

Question

Hi guys recently I got stuck with PHP preg_match_all(). I'm really bad on REGEXP, I had to find:

var nx = (100000 + x) * 23452;

with preg_match_all(), I do this:

preg_match_all('/var nx = (100000 + x) * (.*);/', $html, $token);
return $token[1][0];

I want output like this on my array:

23452

Please anyone help me, with explanation will be appreciate. Thanks.