import java.util.Scanner;
import java.math.BigInteger;

public class Factorial {

    public BigInteger factorialOf(Integer value){

        Scanner scanner = new Scanner(System.in);
        System.out.println("Enter a number: ");
        int userInput = scanner.nextInt();
        int counter = userInput;
        BigInteger result = BigInteger.ONE;
        for(int i=1; i <counter; i++){
            value = value*i;
        }


        System.out.println(value);
        return result.multiply(BigInteger.valueOf(value));
    }

}