import java.util.*;
public class Main {
    public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    double sec = sc.nextInt();
    int num = sc.nextInt();
    double maxSec = sc.nextInt();
    sc.close();
    maxSec += 0.5;
    double mult = maxSec / sec;
    System.out.println((int)mult * num);
    }
}
/tmp/hf-datasets-cache/medium/datasets/42704881117311-config-parquet-and-info-qiankunmu-Project_CodeNet-896c9d36/hub/datasets--qiankunmu--Project_CodeNet_Python800_and_Java250/snapshots/c899fde44a77ba1cc14973ed3de064e4ff3aadc7/Project_CodeNet_Java250.tar.gz