Hi. If someone could please help me with conversion for a Opana (Oxymorphone) tablet into doses that won't kill me, I'd appreciate it.

I normally take between 7 - 9 Norcos (10mg/325mg) a day (not at once, but throughout the entire day). I got a a few 40mg Opana Extended Release pills to try, but I do NOT want to take a whole pill, even though I am opiate tolerant, and even though it is Extended Release - I hear they're extremely strong, and I'm really not in the mood to die. I was told to cut the pill up into many equal pieces. My question is, if I have one 40mb Opana ER tablet, how many times does the pill need to be equally cut up until all pieces are the equivelant, in strength, to a Norco? I hope I'm making sense here. If anyone can help me out, I'd really appreciate it. Thanks!