You are given a math word problem and you are supposed to apply multiplication or division mathematical operators on the numbers embedded in the text to answer the following question and then only report the final numerical answer.

[Q]: A clothing store offers a 20 % discount on all purchases . How much would a shopper pay for an item originally costing 21 dollars dollars ?
[A]: 16.8

[Q]: A chef needs to cook 13 potatoes . He has already cooked 5 . If each potato takes 6 minutes to cook , how long will it take him to cook the rest ?
[A]: 48

[Q]: In 1986 , there were 1125 students in Central High School . The number of students enrolled in 1987 was 4 % less than in 1986 . How many students were enrolled in 1987 ?
[A]:
1080