Finding the factorial using callable interface in java

package projsamples;

import java.util.Collection;
import java.util.List;
import java.util.Scanner;
import java.util.concurrent.Callable;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.Future;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.TimeoutException;

public class FactorialUsingThreads {

    public static void main(String[] args)  throws InterruptedException,ExecutionException{

        Scanner reader = new Scanner(System.in);
        int number = reader.nextInt();
        ExecutorService es = Executors.newSingleThreadExecutor();
        Future<Integer> result=es.submit(new FactorialCalc(number));
        System.out.println("result value after calc is: "+ result);
        int finalResult =(int)result.get();
        System.out.println("The result of the factorial calculation for the"+number+"is: "+finalResult);
    }

    }

    class FactorialCalc implements Callable<Integer>{

    private int number;

    public FactorialCalc(int number) {
        super();
        this.number = number;
    }

    @Override
    public Integer call() throws Exception {
        // TODO Auto-generated method stub
        return factorial(number);
    }

    private Integer factorial(int number2) throws InterruptedException  {
        // TODO Auto-generated method stub
        int number = number2;
        int result = 1;
        while(number2 !=0){

            result = number*result;
            number=number-1;
            Thread.sleep(100);

        }
        System.out.println("result"+result);
        return result;

    }
}

In the above code what I am trying to do is, I want to find the factorial number for any number entered by user. The result returned is the object when I try to typecast the integer object and the get the value is not happening. I know this could be a very basic thing which I am not able to do.any small heads up on this would be helpful.

Thanks a lot in advance for all the kind people who can help.

This has to do with multithreading. You just need number2 in factorial method, and remember decrement it.

private Integer factorial(int number2) throws InterruptedException  {    
    int result = 1;
    while(number2 != 0){    
        result = number2 * result;
        number2 = number2 - 1;
        Thread.sleep(100);    
    }
    System.out.println("result"+result);
    return result;    
}