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

Input: Consider Input: Problem: company x provides bottled water to its employees in 10 liter bottles , $ 2 each . at least how many 10 l bottles must company x buy monthly , so that new contract with $ 50 fixed monthly rate and $ 1 for 50 l bottle each paid off ? ( assume that no other costs apply )

Output: 28


Input: Consider Input: Problem: a salt manufacturing company produced a total of 2000 tonnes of salt in january of a particular year . starting from february its production increased by 100 tonnes every month over the previous months until the end of the year . find its ave 66 rage daily production for that year ?

Output: 83


Input: Consider Input: Problem: if the price of a certain computer increased 30 percent from d dollars to 351 dollars , then 3 d =


Output: 71