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

Example Input: Problem: a company wants to spend equal amounts of money for the purchase of two types of computer printers costing $ 500 and $ 300 per unit , respectively . what is the fewest number of computer printers that the company can purchase ?
Example Output: 6

Example Input: Problem: solve the equation for x : 6 x - 47 + 3 x = 4 + 9 - x
Example Output: 

Example Input: Problem: he ratio between the sale price and the cost price of an article is 5 : 6 . what is the ratio between the profit and the cost price of that article ?
Example Output:
1 : 6