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

Input: Consider Input: Problem: a car salesman earns a base salary of $ 1000 per month plus a commission of $ 200 for each car he sells . if the car salesman earned $ 2000 in march , how many cars does he need to sell in april in order to double his march earnings ?

Output: 15


Input: Consider Input: Problem: how many numbers are divisible by both 2 and 3 up to 300 ?

Output: 50


Input: Consider Input: Problem: audrey 4 hours to complete a certain job . ferris can do the same job in 3 hours . audrey and ferris decided to collaborate on the job , working at their respective rates . while audrey worked continuously , ferris took 5 breaks of equal length . if the two completed the job together in 2 hours , how many minutes long was each of ferris ’ breaks ?


Output: 6