According to time.com1, in the first quarter of 2018 (January 1st to May 1st, which is 120 days), Jeff Bezos made $28,447 every 8.93 seconds. You are going to estimate how much money Jeff Bezos made in the first quarter of 2018. Obviously, you cannot calculate with 28,447 in your head. Obviously, you cannot calculate with 8.93 in your head.
Round 28,447 to a number you can calculate with in your head. What number did you decide on?