unit Unit1;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, StdCtrls, Grids;

type
  TForm1 = class(TForm)
    StringGrid1: TStringGrid;
    Button1: TButton;
    Button2: TButton;
    procedure Button1Click(Sender: TObject);
    procedure FormPaint(Sender: TObject);
    procedure Button2Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}
function NOD(A, B: longint): longint;
begin
  while (a <> 0) and (b <> 0) do
     if a >= b then
       a := a mod b
     else
       b := b mod a;
  NOD := a + b;
end;

function NOK(A, B: longint): longint;
begin
  NOK := a * b div NOD (a, b)
end;

procedure TForm1.Button1Click(Sender: TObject);
var i, j: Integer;
begin
  with StringGRid1 do
    for i:=0 to RowCount do   //Заголовки строк не трогаем
    for j:=1 to ColCount do   //Заголовки столбцов не трогаем
      Cells[j, i]:='';
end;

procedure TForm1.FormPaint(Sender: TObject);
begin
with StringGrid1 do
begin
Cells[0,0]:='a[i]';
Cells[0,1]:='b[i]';
Cells[0,2]:='НОД(a[i],b[i])';
Cells[0,3]:='НОК(a[i],b[i])';
end;
end;

procedure TForm1.Button2Click(Sender: TObject);
var i, j: Integer;
begin
with StringGrid1 do
begin
    j:=0;
    for i:=1 to ColCount do begin
    Cells[i,j+3]:=IntToStr(NOD(StrToInt(cells[i,j]),StrToInt(cells[i,j+1])));
    Cells[i,j+4]:=IntToStr(NOK(StrToInt(cells[i,j]),StrToInt(cells[i,j+1])));
end;
end;
end;

end.

    for i:=1 to ColCount do begin

procedure TForm1.Edit1Change(Sender: TObject);
begin
  StringGrid1.ColCount := StrToInt((Sender as TEdit).Text);
end;