using System;

class DoubleMultiply 
{
   public static void Main()  
   {
      double x1, x2, x3=0;
     DateTime dt1 = DateTime.Now;
      for (x1=1; x1<=10000; x1++)
       for(x2=1; x2<=10000; x2++)
        x3 += Math.Sqrt(x1*x2);
     DateTime dt2 = DateTime.Now;
      Console.WriteLine("Final Sum is: " + x3);   // double result
      Console.WriteLine("Tics Difference: " + (dt2.Ticks-dt1.Ticks)/10000000.0 + " seconds") ;
   }
}