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 Perl (v5.18.2) (judge verdict: Accepted)

use strict;
use warnings;
use feature qw( say );

sub solve {
  my ($A, $B, $T) = @_;
  return $B * int($T / $A);
}

sub main {
  chomp (my $line = <STDIN>);
  my ($A, $B, $T) = $line =~ /\A(\d+) (\d+) (\d+)\Z/;
  say solve($A, $B, $T);
}

main() unless (caller);