import java.util.*;
public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		//String tmp = sc.next();
		//int tmp = sc.nextInt();
		//Long tmp = sc.nextLong();
      int A = sc.nextInt();
      int B = sc.nextInt();
      double T = sc.nextInt();
      int time = 0 + A;
      int output = 0;
      while((T + 0.5) >= time){
        output += B;
        time += A;
      }
      System.out.println(output);
	}
} import java.util.*; util.* java public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		//String tmp = sc.next();
		//int tmp = sc.nextInt();
		//Long tmp = sc.nextLong();
      int A = sc.nextInt();
      int B = sc.nextInt();
      double T = sc.nextInt();
      int time = 0 + A;
      int output = 0;
      while((T + 0.5) >= time){
        output += B;
        time += A;
      }
      System.out.println(output);
	}
} Main public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		//String tmp = sc.next();
		//int tmp = sc.nextInt();
		//Long tmp = sc.nextLong();
      int A = sc.nextInt();
      int B = sc.nextInt();
      double T = sc.nextInt();
      int time = 0 + A;
      int output = 0;
      while((T + 0.5) >= time){
        output += B;
        time += A;
      }
      System.out.println(output);
	} main {
		Scanner sc = new Scanner(System.in);
		//String tmp = sc.next();
		//int tmp = sc.nextInt();
		//Long tmp = sc.nextLong();
      int A = sc.nextInt();
      int B = sc.nextInt();
      double T = sc.nextInt();
      int time = 0 + A;
      int output = 0;
      while((T + 0.5) >= time){
        output += B;
        time += A;
      }
      System.out.println(output);
	} 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 double T = sc.nextInt(); T sc.nextInt() sc.nextInt sc int time = 0 + A; time 0 + A 0 A int output = 0; output 0 while((T + 0.5) >= time){
        output += B;
        time += A;
      } (T + 0.5) >= time (T + 0.5) T 0.5 time {
        output += B;
        time += A;
      } output += B output B time += A time A System.out.println(output) System.out.println System.out System System.out output String[] args args public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		//String tmp = sc.next();
		//int tmp = sc.nextInt();
		//Long tmp = sc.nextLong();
      int A = sc.nextInt();
      int B = sc.nextInt();
      double T = sc.nextInt();
      int time = 0 + A;
      int output = 0;
      while((T + 0.5) >= time){
        output += B;
        time += A;
      }
      System.out.println(output);
	}
} public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		//String tmp = sc.next();
		//int tmp = sc.nextInt();
		//Long tmp = sc.nextLong();
      int A = sc.nextInt();
      int B = sc.nextInt();
      double T = sc.nextInt();
      int time = 0 + A;
      int output = 0;
      while((T + 0.5) >= time){
        output += B;
        time += A;
      }
      System.out.println(output);
	}
} Main
import java.util.*;
public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		//String tmp = sc.next();
		//int tmp = sc.nextInt();
		//Long tmp = sc.nextLong();
      int A = sc.nextInt();
      int B = sc.nextInt();
      double T = sc.nextInt();
      int time = 0 + A;
      int output = 0;
      while((T + 0.5) >= time){
        output += B;
        time += A;
      }
      System.out.println(output);
	}
}
