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

Example Input: 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 ?
Example Output: 2475

Example Input: Problem: meena wrote all the numbers from 1 to 29,999 inclusive . how many digits did she write in total ?
Example Output: 138,889

Example Input: Problem: angelo and isabella are both salespersons . in any given week , angelo makes $ 560 in base salary plus 8 percent of the portion of his sales above $ 1,000 for that week . isabella makes 10 percent of her total sales for any given week . for what amount of weekly sales would angelo and isabella earn the same amount of money ?
Example Output:
24,000