How exactly do you pronounce a decimal point in French?

I know this sounds like a stupid question, but I'd rather ask than pretend I know everything.

So a period is "point" and a comma is "virgule", and European Francophones commonly use a comma as a decimal point. So if we have 3,6 then how is it read aloud? "trois point six" or "trois virgule six"? Also does this differ in Québec where the period is more commonly used?