import java.util.Scanner;

public class Main {

    public static void main(String[] args) {
        Scanner s = new Scanner(System.in);

        int a = Integer.parseInt(s.next());
        int b = Integer.parseInt(s.next());
        int t = Integer.parseInt(s.next());

        int num = 0;
        int c = 1;
        int time = a;

        while (time < t + 0.5) {
            num += b;
            time += a;
            c++;
        }

        System.out.println(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