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

Input: Consider Input: Problem: a question paper has 2 parts , a & b , each containing 8 questions . if a student has to choose 8 from part a & 4 from part b , in how many ways can he choose the questions ?

Output: 70


Input: Consider Input: Problem: a shopkeeper loses 15 % , if an article is sold for rs . 102 . what should be the selling price of the article to gain 20 % ?

Output: rs . 144


Input: Consider Input: Problem: what is the units digit of ( 6 ! * 4 ! + 6 ! * 5 ! ) / 12 ?


Output: 0