תעשה את זה בדף אחד הנה:
PHP קוד:
<form name="form1" method="post" action="2.php">
<input type="text" name="mb"><br/
<input type="text" name="gb"><br/>
<input type="submit" name="Submit" value="Submit">
</form>
<?PHP
if ($_POST['Submit']<>"") {
$a=0.6;
$MB1 = $_POST['mb']*$a;
$GB1 = $_POST['gb']*$a;
$S = $GB1 + $MB1;
echo "$S";
}
?>