import java.util.*;
class Main{
	public static void main(String arts[]){
      	Scanner sc =  new Scanner(System.in);
      	int A;
      	int B;
      	double T;
      	int c = 0;
      	A = sc.nextInt();
      	B = sc.nextInt();
      	T = sc.nextInt();
      	T = T + 0.5;
      	c = (B * (int)(T / A));
       System.out.println(c);
    }
}
/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