What would 8 x 10 to the ninth power in standard form

I got something like 800,000,000, I think it's wrong though. I only got eight zeros. There is no decimal in the whole number 8, so how would I do this? Please explain.

8x10^9
move decimal over 9 times to the right
8.0
8,000,000,000.0

8,000,000,000.00
8 billions

It's 8,000,000,000