import java.util.* ;

public class Main {

	static Scanner in = new Scanner(System.in) ;
	
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		int A = in.nextInt() ;
		int B = in.nextInt() ;
		double T = in.nextInt() ;
		T += 0.5 ;
		int sum = 0 ;
		while(T >= (A*1.0)){
			sum += B ;
			T -= A ;
		}
		System.out.println(sum);
	}

} import java.util.* ; util.* java public class Main {

	static Scanner in = new Scanner(System.in) ;
	
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		int A = in.nextInt() ;
		int B = in.nextInt() ;
		double T = in.nextInt() ;
		T += 0.5 ;
		int sum = 0 ;
		while(T >= (A*1.0)){
			sum += B ;
			T -= A ;
		}
		System.out.println(sum);
	}

} Main static Scanner in = new Scanner(System.in) ; in new Scanner(System.in) public static void main(String[] args) {
		// TODO Auto-generated method stub
		int A = in.nextInt() ;
		int B = in.nextInt() ;
		double T = in.nextInt() ;
		T += 0.5 ;
		int sum = 0 ;
		while(T >= (A*1.0)){
			sum += B ;
			T -= A ;
		}
		System.out.println(sum);
	} main {
		// TODO Auto-generated method stub
		int A = in.nextInt() ;
		int B = in.nextInt() ;
		double T = in.nextInt() ;
		T += 0.5 ;
		int sum = 0 ;
		while(T >= (A*1.0)){
			sum += B ;
			T -= A ;
		}
		System.out.println(sum);
	} int A = in.nextInt() ; A in.nextInt() in.nextInt in int B = in.nextInt() ; B in.nextInt() in.nextInt in double T = in.nextInt() ; T in.nextInt() in.nextInt in T += 0.5 T 0.5 int sum = 0 ; sum 0 while(T >= (A*1.0)){
			sum += B ;
			T -= A ;
		} T >= (A*1.0) T (A*1.0) A 1.0 {
			sum += B ;
			T -= A ;
		} sum += B sum B T -= A T A System.out.println(sum) System.out.println System.out System System.out sum String[] args args public class Main {

	static Scanner in = new Scanner(System.in) ;
	
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		int A = in.nextInt() ;
		int B = in.nextInt() ;
		double T = in.nextInt() ;
		T += 0.5 ;
		int sum = 0 ;
		while(T >= (A*1.0)){
			sum += B ;
			T -= A ;
		}
		System.out.println(sum);
	}

} public class Main {

	static Scanner in = new Scanner(System.in) ;
	
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		int A = in.nextInt() ;
		int B = in.nextInt() ;
		double T = in.nextInt() ;
		T += 0.5 ;
		int sum = 0 ;
		while(T >= (A*1.0)){
			sum += B ;
			T -= A ;
		}
		System.out.println(sum);
	}

} Main
import java.util.* ;

public class Main {

	static Scanner in = new Scanner(System.in) ;
	
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		int A = in.nextInt() ;
		int B = in.nextInt() ;
		double T = in.nextInt() ;
		T += 0.5 ;
		int sum = 0 ;
		while(T >= (A*1.0)){
			sum += B ;
			T -= A ;
		}
		System.out.println(sum);
	}

}
