Untitled

<!DOCTYPE HTML>
<html>
    <head>
        <meta charset="utf-8">
        <title> Gruuby Projekt </title>
		<link rel="stylesheet" type="text/css" href="style.css" />
    </head>
    <body>
        <form method="POST">
            <label>A</label>
            <input type="number" name="pole_a">
            <label>B</label>
            <input type="number" name="pole_b">
            <input type="submit" value="Wyśli!">
        </form>
    </body>
</html>
<?php

if(isset($_POST['pole_a']) && isset($_POST['pole_b'])){

    $a = $_POST["pole_a"];
    $b = $_POST["pole_b"];

    echo "A :: " . $a . "<br>";
    echo "B :: " . $b . "<br>";

    echo "<br>";

    echo "Dodawanie :: " . ($a + $b) . "<br>";
    echo "Odejmowanie :: " . ($a - $b) . "<br>";
    echo "Mnożenie :: " . $a * $b . "<br>";
    if($b == 0) echo "Dzielenie :: Nie przez $b ;><br>";
        else echo "Dzielenie :: " . round($a / $b, 2) . "<br>";

}