How do you write 400 million?

Answer 1

Oh, dude, you write 400 million as 400,000,000. It's like four hundred followed by six zeros. So, if you ever need to write a big number like that on a check or something, just remember to add all those zeros at the end. Easy peasy!

Answer 2

You write 400 million as "400,000,000." It's not rocket science, honey. Just add some commas to make it look pretty and you're good to go.

Answer 3

400,000,000