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

[EX Q]: Problem: if the sides of a triangle are 26 cm , 24 cm and 15 cm , what is its area ?
[EX A]: 180

[EX Q]: Problem: a particular library has 75 books in a special collection , all of which were in the library at the beginning of the month . these book are occasionally loaned out through an inter - library program . if , by the end of the month , 80 percent of books that were loaned out are returned and there are 66 books in the special collection at that time , how many books of the special collection were loaned out during that month ?
[EX A]: 45

[EX Q]: Problem: a person buys an article at rs . 400 . at what price should he sell the article so as to make a profit of 40 % ?
[EX A]:
560