Question 1036171
18.3 trillion is 18 and 12 zeroes. 1.83 E13  is scientific notation shifting one mail as 18 is 1.8 E1

321 million is 3.21 E8

1.83 E13 / 3.21 E8 = .57009 E5 which is 5.7009 E4 or 57,000 per person.