public static void Main()
int num_of_cards,Containers=0,Boxes,Envelopes;
Console.WriteLine("The number of cards");
num_of_cards=int.Parse(Console.ReadLine());
Containers=num_of_cards/(int)Math.Pow(49,2);
Boxes=(num_of_cards%(int)Math.Pow(49,2))/49;
Envelopes=((num_of_cards%(int)Math.Pow(49,2))-(Boxes*49))/7;
Console.WriteLine("Containers=>{0}, boxes=>{1} , Envelpes=>{2}", Containers,Boxes,Envelopes);