In order to calculate the miles for a round trip flight you would multiply 3724x2= 7448. How many round trip flights must you take to accumulate 43,000 miles?
To find out you would divide 43,000 by 7448. This leaves you with a long decimal of approximately 5.77. You would round up in this occasion because you need 43,000 or more miles to get a free flight. Therefore you would need 6 round trip flights.
