При каком значении n произведение станет меньше 0,1
p = 1/4 * 1/36 * * 1/(2n)^2
нужно написать программу в паскале.

Const nx=30;var i,j,p,n:integer;A:array[1..nx,1..nx] of integer;d,Sn,min:real;begin p:=1;write('Введите размер матрицы');Read(n);for i:=1 to n do beginfor j:=1 to n do beginA[i,j]:=random(3)-2;write(A[i,j]:4);end;writeln;end;writeln;writeln;for i:=1 to n do beginfor j:=1 to n do beginif i = j then begin if A[i,j]<> 0 then p:=p* A[i,j];write(A[i,j]:4);endelse write(' ':4);end;writeln;end;write('p =',p);writeln;writeln;for i:=1 to n do beginfor j:=1 to n do beginif (i= n -j +1) then begin if A[i,j]<> 0 then p:=p* A[i,j];write(A[i,j]:4);endelse write(' ':4);end;writeln;end;write('p =',p);end.

1)
 var 
n:integer;
begin 
readln(n); 
if(n<0)then write(0) 
else write(n+4);
end.

2)
 var
  a, b: integer;
 begin
  readln(a, b);
  if(a = b) then
write(1)
  else
write(0);
end.

3)
var
  a, b, c, s: integer;
 begin
  s := 0;
  readln(a, b, c);
  if(a >= 0) then s := s + 1;
  if(b >= 0) then s := s + 1;
  if(c >= 0) then s := s + 1;
  write(s);
end.

4)
var
  a, b, c, s: integer;
 begin
  s := 0;
  readln(a, b, c);
  if(a > 0) then s := s + a;
  if(b > 0) then s := s + b;
  if(c > 0) then s := s + c;
  write(s);
end.
5)
 var
  a, b, c: integer;
 begin
  readln(a, b, c);
  if (a < b) then swap(a, b);
  if (a < c) then swap(a, c);
  if (b < c) then swap(b, c);
  write(a, ' ', b, ' ', c);
end.

6)
 var n, k, s, i: integer;
 begin
  s := 0;
  readln(n, k);
  for i := 1 to n.ToString.Length do
  if(strtoint(n.ToString[i]) > k) then s := s + strtoint(n.ToString[i]);
  write(s);
 end.

7)
 var n, s, i: integer;
 begin
  s := 0;
  readln(n);
  for i := 1 to n do
    s := s + i;
  write(s);
 end.

9)
 var n, i: integer;
 begin
  readln(n);
  for i := n downto 1 do
  write(i);
 end.

12
 var
  n, i: integer;
  s: real;
 begin
  s := 0;
  readln(n);
  for i := n downto 1 do
  s:=s+(0.1*i);
    write(s);
 end.

13)
 var n, i: integer;
 begin
  readln(n);
  for i := 1 to n do
    write(sqr(i), ' ');
end.

14)
 var
  n, i, c: integer;
 begin
  i := 1;
  c := 0;
  readln(n);
  while (c <> n) do
  begin
    if(i mod 3 = 0) then begin write(i, ' ');c := c + 1; end;
    i := i + 1;
  end;
end.

15)
 var
  n, i, a: integer;
  c: real;
 begin
  i := 1;
  c := 0;
  readln(n);
  for i := 1 to n do
   begin
    read(a);
    c := c + a;
  end;
  write(c / n)
end.

16)
 var
  n, i, a: integer;
 begin
  i := 1;
  while true do
   begin
    read(a);
    if(a = 0) then break;
    n := n + 1;
  end;
  write(n)
end.