Hello! Working on a copystamp expression at the moment. It's fairly simple. Wondering why this equation in houdini works: ch(“../circle1/radius`ceil(($PT/8) + 0.000000001)`”)

But this one errors out: ch(“../circle1/radius`ceil(($PT/ch(”../circle8/divs“)) + 0.000000001)`”) with the error message Unable to evaluate expression (Syntax error - extra tokens detected in expression

Would love some input on the proper way to pull this info into my hscript expression!! Thanks!