How do you write 3.4 Billion dollars?

Answer 1

$3,400,000,000

USD 3,400,000,000.

That is, if you meant US dollars. The internationally agreed symbol for US dollars is USD but you could have meant dollars used by other countries. If so, my apologies for being presumptious.

Answer 2

Oh, dude, writing 3.4 billion dollars is like writing a big fat check for a private island. You start with the number 3, then add a bunch of zeros, like 3,400,000,000. But hey, who's counting when you've got that much cash, am I right?

Answer 3

Oh, what a happy little question! To write 3.4 billion dollars, you simply write the number 3 followed by nine zeros, like this: $3,400,000,000. Isn't that just lovely? Just imagine all the wonderful things that could be created with such a large amount of money.