3,400,204,007
_______________________
While that's the most straightforward answer, technically when you say "and" it means you've moved to the other side of the decimal point. So to be completely accurate, it would be
3,400,204,000.7
But that's only if you'r being asked by someone who's trying to trip you up (which calculus teachers may do...).
One billion, three hundred forty-two million, seven hundred five thousand, four hundred ten
Seven billion, five hundred thirty-six million, three hundred one thousand, three hundred ninety-eight
3,552,308,725 = three billion, five hundred fifty-two million, three hundred eight thousand, seven hundred twenty-five.
Nine billion six hundred seventy-three million eight hundred ninety thousand four.
Nineteen billion, six hundred seventy-three million, eight hundred ninety thousand four
30,300,030,303
Sixty-three billion, three hundred eighty million, five hundred nine thousand, seven hundred ten.
Four hundred twenty-three billion ninety million seven hundred nine thousand.
One billion, three hundred forty-two million, seven hundred five thousand, four hundred ten
eight billion two hundred eleven million three hundred twenty-one thousand four hundred
Three billion, five hundred fifty-two million, three hundred eight thousand, seven hundred twenty-five
Seven billion, five hundred thirty-six million, three hundred one thousand, three hundred ninety-eight
nineteen billion, six hundred seventy three million, eight hundred ninety thousand and four
30,300,030,303.
3,552,308,725 = three billion, five hundred fifty-two million, three hundred eight thousand, seven hundred twenty-five.
Four hundred and twenty three billion, ninety million, seven hundred and nine thousand
Nine billion six hundred seventy-three million eight hundred ninety thousand four.