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

[EX Q]: Problem: for any positive integer n , the sum of the first n positive integers equals n ( n + 1 ) / 2 . what is the sum of odd all the integers between 10 and 100 ?
[EX A]: 2475

[EX Q]: Problem: the average of first six prime numbers greater than 20 is ?
[EX A]: 3

[EX Q]: Problem: a case contains c cartons . each carton contains b boxes , and each box contains 600 paper clips . how many paper clips are contained in 2 cases ?
[EX A]:
1200 bc