import java.util.Scanner;

public class Factorials {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);

        int num = scanner.nextInt();
        int count = scanner.next().length();
        int result = 1;

        while (num > 1) {

            result = result * num;
            num -= count;
        }
        System.out.println(result);
    }
}