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

Ex Input:
Problem: find the least number must be subtracted from 105829 so that remaining no . is divisible by 21 ?

Ex Output:
10


Ex Input:
Problem: if 32.5 % of the 880 students at a certain college are enrolled in biology classes , how many students at the college are not enrolled in a biology class ?

Ex Output:
594


Ex Input:
Problem: whats the reminder when 65,985 , 241,545 , 898,754 , 582,556 , 898,522 , 454,889 is divided by 16

Ex Output: