using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("a * b \n------\na + b");

        Console.WriteLine("Введите A");

        decimal a = Convert.ToDecimal(Console.ReadLine());

        Console.WriteLine("Введите B");

        decimal b = Convert.ToDecimal(Console.ReadLine());

        decimal f_step = a * b;

        decimal s_step = a + b;

        decimal third = f_step / s_step;

        Console.WriteLine(third);

    }

}