import java.math.BigInteger;

public class Factorial {

    public BigInteger factorialOf(int value){
        BigInteger input = BigInteger.valueOf(value);
        BigInteger total = BigInteger.valueOf(1);

        for (int i = 1; i <= input.intValue(); i++){
            total = total.multiply(BigInteger.valueOf(i));
        }
        return total;
    }

}