using System;

public class Program

{

    public static void Main()

    {

        float num1,num2, total;

        int total2;

        string str1, str2;

                str1 = "123";

                str2 = "856";

        int C_str1, C_str2;

            num1 = 2.5f;

            num2 = 3f;

        C_str1 = int.Parse(str1);

        C_str2 = int.Parse(str2);

        total = num1*num2;

        total2 = (int)num1 * (int)num2;

        Console.WriteLine(str1+str2);

        Console.WriteLine(str1+num1);

        Console.WriteLine(C_str1+C_str2);

        Console.WriteLine(total);

        Console.WriteLine((float)total2);

        Console.WriteLine(num1+"ppp");

    }

}