Write the number in standard form.
#2. one hundred eight million, four hundred sixty thousand, eight hundred thirty
#7. three hundred seven million, one hundred ninety seven thousand, three hundred twenty six
#14. eight hundred four million, six hundred seventy three thousand, three hundred eighty four
#15. nine hundred five million, six hundred seventy eight thousand, four hundred eighty two
#18. three hundred eight million, nine hundred seventy five thousand, six hundred forty five