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

[EX Q]: Problem: mary can do a piece of work in 26 days . rosy is 30 % more efficient than mary . the number of days taken by rosy to do the same piece of work is ?
[EX A]: 20

[EX Q]: Problem: what least number must be subtracted from 13294 so that the remainder is exactly divisible by 97 ?
[EX A]: 5

[EX Q]: Problem: how many seconds will a 600 metre long train take to cross a man walking with a speed of 3 km / hr in the direction of the moving train if the speed of the train is 63 km / hr ?
[EX A]:
36