Question 396475
At the moment there are over 6.89 billion people in the world. 
There are about 57,900,000 square miles of land surface on this planet. There are 640 acres in one square mile. 
How many acres of land surface are there per person? 
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Area = 5.79E7*6.4E2 acres = 3.7056E10 acres
3.7056E10 acres/6.89E9 people =~ 5.378 acres per person