import java.util.Scanner;

public class Main {

	public static void main(String[] args) {

		Scanner sc = new Scanner(System.in);
		int ans = 1;
      
      	while(sc.hasNextInt()){
			 ans *= sc.nextInt();
        }
		sc.close();

		System.out.println(ans);
	}
} import java.util.Scanner; Scanner java.util public class Main {

	public static void main(String[] args) {

		Scanner sc = new Scanner(System.in);
		int ans = 1;
      
      	while(sc.hasNextInt()){
			 ans *= sc.nextInt();
        }
		sc.close();

		System.out.println(ans);
	}
} Main public static void main(String[] args) {

		Scanner sc = new Scanner(System.in);
		int ans = 1;
      
      	while(sc.hasNextInt()){
			 ans *= sc.nextInt();
        }
		sc.close();

		System.out.println(ans);
	} main {

		Scanner sc = new Scanner(System.in);
		int ans = 1;
      
      	while(sc.hasNextInt()){
			 ans *= sc.nextInt();
        }
		sc.close();

		System.out.println(ans);
	} Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int ans = 1; ans 1 while(sc.hasNextInt()){
			 ans *= sc.nextInt();
        } sc.hasNextInt() sc.hasNextInt sc {
			 ans *= sc.nextInt();
        } ans *= sc.nextInt() ans sc.nextInt() sc.nextInt sc sc.close() sc.close sc 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 ans = 1;
      
      	while(sc.hasNextInt()){
			 ans *= sc.nextInt();
        }
		sc.close();

		System.out.println(ans);
	}
} public class Main {

	public static void main(String[] args) {

		Scanner sc = new Scanner(System.in);
		int ans = 1;
      
      	while(sc.hasNextInt()){
			 ans *= sc.nextInt();
        }
		sc.close();

		System.out.println(ans);
	}
} Main
import java.util.Scanner;

public class Main {

	public static void main(String[] args) {

		Scanner sc = new Scanner(System.in);
		int ans = 1;
      
      	while(sc.hasNextInt()){
			 ans *= sc.nextInt();
        }
		sc.close();

		System.out.println(ans);
	}
}