Problem:
Score : 100 points

Problem Statement

A biscuit making machine produces B biscuits at the following moments: A seconds, 2A seconds, 3A seconds and each subsequent multiple of A seconds after activation.

Find the total number of biscuits produced within T + 0.5 seconds after activation.

Constraints

All values in input are integers.

1 \leq A, B, T \leq 20

Input

Input is given from Standard Input in the following format:

A B T

Output

Print the total number of biscuits produced within T + 0.5 seconds after activation.

Sample Input 1

3 5 7

Sample Output 1

10

Five biscuits will be produced three seconds after activation.

Another five biscuits will be produced six seconds after activation.

Thus, a total of ten biscuits will be produced within 7.5 seconds after activation.

Sample Input 2

3 2 9

Sample Output 2

6

Sample Input 3

20 20 19

Sample Output 3

0

Solution in Python (3.4.3) (judge verdict: Runtime Error)

N=int(input())
LA=list(map(int,input().split()))
ans=[]

def gcd(m,n):
    while n:
        m,n=n,m%n
    return m

from functools import reduce
def multigcd(item):
    return reduce(gcd, item)

for n in range(N):
    L=LA[:n]+LA[n+1:]
    ans.append(multigcd(L))

print(max(ans))