Warning: Division by zero in c:\home\bamohawk\www\php\test3.php on line 14

Warning: Division by zero in c:\home\bamohawk\www\php\test3.php on line 15
$a =
$b =
$a * $b = 0
$a / $b =
$b / $a =
$a + $b = 0
$a - $b = 0
$b - $a = 0
$a % $b =
$b % $a =