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 t = sc.nextInt();
    int ans = 0;
    
    for(int i=1;i<=t;i++){
      if(t>=i*a){
        ans += b;
      }
    }
    System.out.println(ans);
  }
} 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 t = sc.nextInt();
    int ans = 0;
    
    for(int i=1;i<=t;i++){
      if(t>=i*a){
        ans += b;
      }
    }
    System.out.println(ans);
  }
} Main public static void main(String[] args){
    Scanner sc = new Scanner(System.in);
    int a = sc.nextInt();
    int b = sc.nextInt();
    int t = sc.nextInt();
    int ans = 0;
    
    for(int i=1;i<=t;i++){
      if(t>=i*a){
        ans += b;
      }
    }
    System.out.println(ans);
  } main {
    Scanner sc = new Scanner(System.in);
    int a = sc.nextInt();
    int b = sc.nextInt();
    int t = sc.nextInt();
    int ans = 0;
    
    for(int i=1;i<=t;i++){
      if(t>=i*a){
        ans += b;
      }
    }
    System.out.println(ans);
  } 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 t = sc.nextInt(); t sc.nextInt() sc.nextInt sc int ans = 0; ans 0 for(int i=1;i<=t;i++){
      if(t>=i*a){
        ans += b;
      }
    } int i=1; int i=1; i 1 i<=t i t i++ i++ i {
      if(t>=i*a){
        ans += b;
      }
    } {
      if(t>=i*a){
        ans += b;
      }
    } if(t>=i*a){
        ans += b;
      } t>=i*a t i*a i a {
        ans += b;
      } ans += b ans b System.out.println(ans) System.out.println System.out System System.out ans 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 t = sc.nextInt();
    int ans = 0;
    
    for(int i=1;i<=t;i++){
      if(t>=i*a){
        ans += b;
      }
    }
    System.out.println(ans);
  }
} public class Main{
  public static void main(String[] args){
    Scanner sc = new Scanner(System.in);
    int a = sc.nextInt();
    int b = sc.nextInt();
    int t = sc.nextInt();
    int ans = 0;
    
    for(int i=1;i<=t;i++){
      if(t>=i*a){
        ans += b;
      }
    }
    System.out.println(ans);
  }
} 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 t = sc.nextInt();
    int ans = 0;
    
    for(int i=1;i<=t;i++){
      if(t>=i*a){
        ans += b;
      }
    }
    System.out.println(ans);
  }
}
