Someone

<html>

<head>

  <title>Moo's Calculator</title>

</head>

<body>

  <form action="process.php" method="post">
    <input name="number1" type="text" />  
    <select name="operation">
      <option>+</option>
       <option>-</option>
       <option>*</option>
       <option>/</option>
    </select>
    <input name="number2" type="text" />
    <input type="submit" />
  </form>

</body>

</html>
---------------------------------------------------
<html><body>
<?php
$number1 = $_POST['number1'];
$operation = $_POST['operation'];
$number2 = $_POST['number2'];
$total = $number1 . $operation . $number2

echo "Your result is ". $total;

?>
</body></html>