Исправьте ошибку в программе

procedure TForm1.Button2Click(Sender: TObject);
a,b:real; // тут ошибка [Error] Unit1.pas(51): Unknown directive: 'a'
begin
a:=StrToInt(Edit6.Text);
b:=(a div 100);
 
Edit7.Text:=FloatToStrF(b, fffixed,4,2);
 
 
end;
 
end.

unit Unit1;
 
interface
 
uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, StdCtrls;
 
type
  TForm1 = class(TForm)
    Edit1: TEdit;
    Edit2: TEdit;
    Edit3: TEdit;
    Button1: TButton;
    Edit4: TEdit;
    Edit5: TEdit;
    Edit6: TEdit;
    Button2: TButton;
    Edit7: TEdit;
    procedure Button1Click(Sender: TObject);
    procedure Button2Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;
 
var
  Form1: TForm1;
 
implementation
 
{$R *.dfm}
 
procedure TForm1.Button1Click(Sender: TObject);
var a,b,c,d,e:integer;
begin
a:=StrToInt(Edit1.Text);
b:=StrToInt(Edit2.Text);
c:=StrToInt(Edit3.Text);
d:=a*c;
e:=2*(a+b);
Edit4.text:=IntToStr(d);
Edit5.text:=IntToStr(e);
 
 
end;
 
 
procedure TForm1.Button2Click(Sender: TObject);
a,b:real;
begin
a:=StrToInt(Edit6.Text);
b:=(a div 100);
 
Edit7.Text:=FloatToStrF(b, fffixed,4,2);
 
 
end;
 
end.

VAR a,b:real;