Yep. If he says that by the end of a 365 day period he will have drank 2,920 glasses of water, then, if you divide 2,920 by 365 you will get the right answer of the average 8 glasses of water a day.
1.) 2368000 (two million, three hundred sixty-eight thousand) 2.) 864,346,000 rounded to nearest thousand 3.) 864,345,537.00 not 100% on the last answer