unit Unit1;

{$mode objfpc}{$H+}

interface

uses
  Classes, SysUtils, FileUtil, Forms, Controls, Graphics, Dialogs, StdCtrls;

type

  { TForm1 }

  TForm1 = class(TForm)
    Button1: TButton;
    Edit1: TEdit;
    Edit2: TEdit;
    Edit3: TEdit;
    Edit4: TEdit;
    Label1: TLabel;
    Label2: TLabel;
    Label3: TLabel;
    Label4: TLabel;
    procedure klikrezultat(Sender: TObject);
  private

  public

  end;

var
  Form1: TForm1;

implementation

{$R *.lfm}

{ TForm1 }

procedure TForm1.klikrezultat(Sender: TObject);
  var udaljenost, potrosnja, cena, rezultat : real;
begin
udaljenost := StrToFloat (Edit1.text);
potrosnja := StrToFloat (Edit2.text);
cena := StrToFloat (Edit3.text);
rezultat := 2*udaljenost*cena*potrosnja/100;
Edit4.Text := FloatToStr(rezultat);


end;

end.