import java.util.*;


public class Main {
    public static void main(String[] args) {

        Scanner sc = new Scanner(System.in);
        int a = sc.nextInt();
        int b = sc.nextInt();
        int c = sc.nextInt();
        int amount = 0;
      	int time = a;  
      
        for(int i = 2; time <= c + 0.5; i++){
            amount += b;
          	time = a * i;
        }
        
        System.out.println(amount);
    }
} import java.util.*; util.* java public class Main {
    public static void main(String[] args) {

        Scanner sc = new Scanner(System.in);
        int a = sc.nextInt();
        int b = sc.nextInt();
        int c = sc.nextInt();
        int amount = 0;
      	int time = a;  
      
        for(int i = 2; time <= c + 0.5; i++){
            amount += b;
          	time = a * i;
        }
        
        System.out.println(amount);
    }
} Main public static void main(String[] args) {

        Scanner sc = new Scanner(System.in);
        int a = sc.nextInt();
        int b = sc.nextInt();
        int c = sc.nextInt();
        int amount = 0;
      	int time = a;  
      
        for(int i = 2; time <= c + 0.5; i++){
            amount += b;
          	time = a * i;
        }
        
        System.out.println(amount);
    } main {

        Scanner sc = new Scanner(System.in);
        int a = sc.nextInt();
        int b = sc.nextInt();
        int c = sc.nextInt();
        int amount = 0;
      	int time = a;  
      
        for(int i = 2; time <= c + 0.5; i++){
            amount += b;
          	time = a * i;
        }
        
        System.out.println(amount);
    } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int a = sc.nextInt(); a sc.nextInt() sc.nextInt sc int b = sc.nextInt(); b sc.nextInt() sc.nextInt sc int c = sc.nextInt(); c sc.nextInt() sc.nextInt sc int amount = 0; amount 0 int time = a; time a for(int i = 2; time <= c + 0.5; i++){
            amount += b;
          	time = a * i;
        } int i = 2; int i = 2; i 2 time <= c + 0.5 time c + 0.5 c 0.5 i++ i++ i {
            amount += b;
          	time = a * i;
        } {
            amount += b;
          	time = a * i;
        } amount += b amount b time = a * i time a * i a i System.out.println(amount) System.out.println System.out System System.out amount String[] args args public class Main {
    public static void main(String[] args) {

        Scanner sc = new Scanner(System.in);
        int a = sc.nextInt();
        int b = sc.nextInt();
        int c = sc.nextInt();
        int amount = 0;
      	int time = a;  
      
        for(int i = 2; time <= c + 0.5; i++){
            amount += b;
          	time = a * i;
        }
        
        System.out.println(amount);
    }
} public class Main {
    public static void main(String[] args) {

        Scanner sc = new Scanner(System.in);
        int a = sc.nextInt();
        int b = sc.nextInt();
        int c = sc.nextInt();
        int amount = 0;
      	int time = a;  
      
        for(int i = 2; time <= c + 0.5; i++){
            amount += b;
          	time = a * i;
        }
        
        System.out.println(amount);
    }
} Main
import java.util.*;


public class Main {
    public static void main(String[] args) {

        Scanner sc = new Scanner(System.in);
        int a = sc.nextInt();
        int b = sc.nextInt();
        int c = sc.nextInt();
        int amount = 0;
      	int time = a;  
      
        for(int i = 2; time <= c + 0.5; i++){
            amount += b;
          	time = a * i;
        }
        
        System.out.println(amount);
    }
}