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

Input: Consider Input: Problem: in one alloy there is 12 % chromium while in another alloy it is 8 % . 35 kg of the first alloy was melted together with 40 kg of the second one to form a third alloy . find the percentage of chromium in the new alloy .

Output: 9.75 %

Input: Consider Input: Problem: how many digits are required to number a book containing 240 pages ?

Output: 612

Input: Consider Input: Problem: find the value of 1 / ( 3 + 1 / ( 3 + 1 / ( 3 - 1 / 3 ) ) )
Output: 27 / 89