Rule 500 and 0

What does 500 and 0 make?
*mind blown*

Girl: what?
Boy: rule 500 and 0?
Girl: oh...

Rule 500

If something has Diavolo from the fifth part of jojo dying in it, its canon.

Guy 1: Did you see Diavolo dying in the background?
Guy 2: Yeah, this shit's canon now because of rule 500.

Rule 500

If something has Diavolo from the fifth part of jojo dying in it, its canon

Guy 1: Hey did you see Diavolo dying in the background?
Guy 2: Yeah, this shits canon now because of rule 500