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

[EX Q]: Problem: in how many no . between 10 and 30 exactly two of the digits is 2 ?
[EX A]: 1

[EX Q]: Problem: 12 . what is the dividend . divisor 17 , the quotient is 9 and the remainder is 10 .
[EX A]: 163

[EX Q]: Problem: 15 men take 21 days of 8 hrs . each to do a piece of work . how many days of 5 hrs . each would it take for 21 women if 3 women do as much work as 2 men ?
[EX A]:
3