"But I really don't know what you're trying to accomplish or what answer you expected"

I'm going to go all smartass which I don't do normally, but I found this comment entertaining and enlightening relative to the situation at hand... "divide by zero" is the appropriate error message here :)

No disrespect intended; your post is well qualified. I just found it accurate, appropriate but funny in context (it's Friday, and I enjoy good posts after work hours on Fridays)