using System;
using System.Numerics;
public class Program
{
public static void Main()
{
var bigInteger = BigInteger.Parse("99948737409827123561274918345136111");
Console.WriteLine("Square: " + BigInteger.Pow(bigInteger, 2));
}
}
/*
run:
Square: 9989750109818575944543011603257468085007254792416514919846731116204321
*/