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

Ex Input:
Problem: two trains travel in opposite directions at 36 kmph and 45 kmph and a man sitting in slower train passes the faster train in 12 seconds . the length of the faster train is

Ex Output:
270 m

Ex Input:
Problem: calculate the sum of first 60 natural numbers .

Ex Output:
1830

Ex Input:
Problem: 70,76 , 74,85 , 90,105 , 105,130 , 130,130 the list consists of the times in seconds that it took each of the 10 school children to run a distance of 400 mts . if the standard deviation of the 10 running times is 22.4 , rounded to the nearest tenth of a second , how many of the 10 running times are more than 1 standard deviation below the mean of the 10 running times .

Ex Output:
3