I would say three hundred four, or if I am listing the numbers I say the zero because it is more easily understood, especially over the phone
I say zero, "O" is a letter from the Alphabet.
depends on who i am talking to and what it is for...
then i say 3oh4,, but if like i am talking on the phone telling them an account # or something i say 3zero4
3 oh 4 unless I'm at work and talking on the phone to another business person, then just to be more clear I would say 3 zero 4.
3oh4....you better watch those whens ;)
Zero, everytime without fail. Drives me crazy when people say the former
the correct way is to say zero. because o is a letter not a number
I say it both ways.