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

Ex Input:
Problem: a man , a woman and a boy can together complete a piece of work in 3 days . if a woman alone can do it in 6 days and a boy alone in 18 days , how long will a man take to complete the work ?

Ex Output:
9 days


Ex Input:
Problem: the average of numbers 0.34204 , 0.34203 , 0.34202 and 0.34201 is ?

Ex Output:
0.342025


Ex Input:
Problem: a goods train runs at the speed of 72 km / hr and crosses a 290 m long platform in 26 sec . what is the length of the goods train ?

Ex Output:

230