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

Problem: the ratio between the sale price and the cost price of an article is 12 : 7 . what is the ratio between the profit and the cost price of that article ?
5 : 7

Problem: what is the 149 th digit to the right of the decimal point in the decimal form of 30 / 33 ?
9

Problem: what is the remainder when 12987 ^ ( 65987036 ) is divided by 5 ?

1