The task is to generate the correct answer for a given math problem.

[EX Q]: Problem: during a certain two - week period , 60 percent of the movies rented from a video store were comedies , and of the remaining movies rented , there were 3 times as many dramas as action movies . if no other movies were rented during that two - week period and there were a action movies rented , then how many comedies , in terms of a , were rented during that two - week period ?
[EX A]: 6 a

[EX Q]: Problem: a , b , c , d , e , f , g , h sitting in a row what is the probability that a , b , c sitting together ?
[EX A]: 3 / 28

[EX Q]: Problem: the pilot of a small aircraft with a 40 - gallon fuel tank wants to fly to cleveland , which is 480 miles away . the pilot recognizes that the current engine , which can fly only 6 miles per gallon , will not get him there . by how many miles per gallon must the aircraft ' s fuel efficiency be improved to make the flight to cleveland possible ?
[EX A]:
6