const r = 3**2;

begin
  assert(round(2**3)=8);
  assert(round(3 * 2**3)=24);
  assert(round(2**3 * 3)=24);
  assert(round(2.0**3)=8);
  assert(round(2**3.0)=8);
  assert(round(-2**2)=4);
  assert(round(-(2**2))=-4);
  var b: byte := 2;
  assert(round(b**2) = 4);
  assert(abs(2**-2-0.25) < 0.0001);
  var i := round(2**3);
  assert(i = 8);
  assert(round(r) = 9);
  var bi := new BigInteger(3);
  assert(bi**2 = 9);
  var bi2 := bi ** 2;
end.