using System;

public class Program

{

    public static void Main()

    {

        float n1,n2, t;

        int t2;

        string s1,s2;

            s1 = "123";

            s2 = "856";

        int C_s1, C_s2;

            C_s1 = int.Parse(s1);

            C_s2 = int.Parse(s2);

            n1 = 2.5f;

            n2 = 3f;

            t = n1*n2;

            t2 = (int)n1*(int)n2;

        Console.WriteLine(C_s1+C_s2);

        Console.WriteLine(s1+s2);

        Console.WriteLine(s1+n1);

        Console.WriteLine(t);

        Console.WriteLine((float)t2);

        Console.WriteLine(n1+"bbb");

    }

}