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();
		double t = sc.nextInt();
	
		t += 0.5;
		int count = 0;
		int s = 1;

		boolean flag = true;
		while(flag){
			if(a * s < t){
				count++;
				s++;
			}else{
				flag = false;
			}
		}
		System.out.println(count * b);
	}
} 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();
		double t = sc.nextInt();
	
		t += 0.5;
		int count = 0;
		int s = 1;

		boolean flag = true;
		while(flag){
			if(a * s < t){
				count++;
				s++;
			}else{
				flag = false;
			}
		}
		System.out.println(count * b);
	}
} Main public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		int a = sc.nextInt();
		int b = sc.nextInt();
		double t = sc.nextInt();
	
		t += 0.5;
		int count = 0;
		int s = 1;

		boolean flag = true;
		while(flag){
			if(a * s < t){
				count++;
				s++;
			}else{
				flag = false;
			}
		}
		System.out.println(count * b);
	} main {
		Scanner sc = new Scanner(System.in);
		int a = sc.nextInt();
		int b = sc.nextInt();
		double t = sc.nextInt();
	
		t += 0.5;
		int count = 0;
		int s = 1;

		boolean flag = true;
		while(flag){
			if(a * s < t){
				count++;
				s++;
			}else{
				flag = false;
			}
		}
		System.out.println(count * b);
	} 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 t += 0.5 t 0.5 int count = 0; count 0 int s = 1; s 1 boolean flag = true; flag true while(flag){
			if(a * s < t){
				count++;
				s++;
			}else{
				flag = false;
			}
		} flag {
			if(a * s < t){
				count++;
				s++;
			}else{
				flag = false;
			}
		} if(a * s < t){
				count++;
				s++;
			}else{
				flag = false;
			} a * s < t a * s a s t {
				count++;
				s++;
			} count++ count s++ s {
				flag = false;
			} flag = false flag false System.out.println(count * b) System.out.println System.out System System.out count * b count b 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();
		double t = sc.nextInt();
	
		t += 0.5;
		int count = 0;
		int s = 1;

		boolean flag = true;
		while(flag){
			if(a * s < t){
				count++;
				s++;
			}else{
				flag = false;
			}
		}
		System.out.println(count * b);
	}
} public class Main{
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		int a = sc.nextInt();
		int b = sc.nextInt();
		double t = sc.nextInt();
	
		t += 0.5;
		int count = 0;
		int s = 1;

		boolean flag = true;
		while(flag){
			if(a * s < t){
				count++;
				s++;
			}else{
				flag = false;
			}
		}
		System.out.println(count * b);
	}
} 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();
		double t = sc.nextInt();
	
		t += 0.5;
		int count = 0;
		int s = 1;

		boolean flag = true;
		while(flag){
			if(a * s < t){
				count++;
				s++;
			}else{
				flag = false;
			}
		}
		System.out.println(count * b);
	}
}
