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

Ex Input:
Problem: calculate the share of z , if rs . 3720 is divided among x , y and z in the ratio 7 : 8 : 11 ?

Ex Output:
1574.1


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: sophia finished 2323 of a book . she calculated that she finished 90 more pages than she has yet to read . how long is her book ?

Ex Output:

270