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

Input: Consider Input: Problem: a tyre has two punctures . the first puncture alone would have made the tyre flat in 9 minutes and the second alone would have done it in 6 minutes . if air leaks out at a constant rate , how long does it take both the punctures together to make it flat ?

Output: 335 min

Input: Consider Input: Problem: find the greatest number that will divide 205 , 626 and 588 leaving 5 , 6 and 8 as remainders respectively

Output: 2

Input: Consider Input: Problem: a cistern 5 m long and 4 m wide contains water up to a depth of 1 m 25 cm . the total area of the wet surface is :
Output: 42.5 m 2