Combobox Problem

[Darksniper]

Delphi-Quellcode:

procedure TForm3.Button9Click(Sender: TObject);
var stufe,Fl,Rf,Nf,Stufe2 : Integer;
begin
  stufe := StrToInt (Edit31.Text);
  stufe2 := Stufe-1;
  Rf := StrToInt (Edit32.Text);
  Nf:= StrToInt (Edit33.Text);
  Fl := StrToInt (Edit34.Text);
 if ComboBox1.ItemIndex = 0 then
  begin
   Label57.Caption := 200*power(2,Stufe2);
   Label58.Caption := 1000*power(2,Stufe2);
   Label59.caption := 200*power(2,Stufe2);
   Label64.Caption := ((200+1000)div(1000*(1+FL)))*60;
  end;
end;

Label57.Caption := 200*power(2,Stufe2);
[Fehler] ogame1.pas(458): E2010 Inkompatible Typen: 'string' und 'Double'