using System;
using System.Numerics;
public class Program
{
public static void Main()
{
var bigInteger = BigInteger.Parse("99948737409827123561274918345136180111");
Console.WriteLine("Add: " + (bigInteger + 1));
Console.WriteLine("Add: " + (bigInteger + bigInteger));
Console.WriteLine("Multiply: " + (bigInteger * bigInteger));
Console.WriteLine("Divide: " + (bigInteger / bigInteger));
}
}
/*
run:
Add: 99948737409827123561274918345136180112
Add: 199897474819654247122549836690272360222
Multiply: 9989750109818575944543011603257481900121637053541187806388494617612631972321
Divide: 1
*/