<?php
$hello = "Hello World!";
$blob = 564983;
$mulm = "655932";
?>
<!DOCTYPE html>
<html>
  <head>
    <title><?php echo $blob + $mulm; ?></title>
  </head>
  <body>
    <?php
      echo "<p>" . $hello . "</p>";
    ?>
  </body>
</html>