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

Ex Input:
Problem: a can do a piece of work in 22 days and b alone can do it in 10 days . b works at it for 5 days and then leaves . a alone can finish the remaining work in

Ex Output:
11 days


Ex Input:
Problem: if x is to be chosen at random from the set { 1 , 2 , 3 , 4 } and y is to be chosen at random from the set { 6 , 7 } , what is the probability that xy will be even ?

Ex Output:
1 / 6


Ex Input:
Problem: how long does a train 110 m long running at the speed of 72 km / hr takes to cross a bridge 112 m length ?

Ex Output:

11.1 sec