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

Ex Input:
Problem: in how many no . between 10 and 30 exactly two of the digits is 2 ?

Ex Output:
1


Ex Input:
Problem: you enter a weight loss challenge game and manage to lose 13 % of your body weight . for the final weigh in you are forced to wear clothes that add 2 % to your weight . what percentage of weight loss is measured at the final weigh in ?

Ex Output:
11.26 %


Ex Input:
Problem: a dress on sale in a shop is marked at $ d . during the discount sale its price is reduced by 45 % . staff are allowed a further 40 % reduction on the discounted price . if a staff member buys the dress what will she have to pay in terms of d ?

Ex Output:

0.33