using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("въведи инчове:");

        int a=int.Parse(Console.ReadLine());

        double b,c;

        b=a*2.54;

        Console.WriteLine(b+"cm");

        for(int i=10;i<=15;i++)

        {  c=i*2.54;

            Console.WriteLine(i+" inch:"+c+" cm");  

        }

        Console.WriteLine("въведи r:");

        double r=double.Parse(Console.ReadLine());

        double S,L,S1,L1;const double p=3.14;

        S=(r*r)*p;

        L=(2*r)*p;

        Console.WriteLine("s={0:F2} L={1:F2}",S,L);

        for(int i=10;i<=15;i++)

        {  S1=i*i*p;

           L1=2*i*p;

         Console.WriteLine("{0:F2} s={1:F2} L={2:F2}",i,S1,L1);

        }

    }

}