using System;

public class Program

{

    public static void Main()

    {

        var coef1 = 1.75;

        var coef2 = 3;

        var coef3 = 6.2;

        var K = 1/coef1 + 1/coef2 + 1/coef3;

        Console.WriteLine($"K = {K}; {K<1}");

    }

}