diff --git a/test.php b/test.php
index 2e4d46a..5c7082d 100644
--- a/test.php
+++ b/test.php
@@ -1,50 +1,98 @@
 <?php
-$liter1 = 40.5;
-$liter2 = 35.7;
-$preis  = 1.499;
+$defaultVolume1 = 40.5;
+$defaultVolume2 = 35.7;
+$defaultPrice   = 1.499;
 
-$gesamtLiter     = $liter1 + $liter2;
-$kostenFuellung1 = $liter1 * $preis;
-$kostenFuellung2 = $liter2 * $preis;
-$gesamtKosten    = $gesamtLiter * $preis;
+$readNumber = function (string $key, $default) {
+  if (!isset($_REQUEST[$key]) || $_REQUEST[$key] === '') {
+    return $default;
+  }
 
-$fmtK1 = number_format($kostenFuellung1, 2, ',', '.');
-$fmtK2 = number_format($kostenFuellung2, 2, ',', '.');
-$fmtKG = number_format($gesamtKosten,    2, ',', '.');
+  $raw = (string)$_REQUEST[$key];
+  $norm = str_replace([' ', ','], ['', '.'], $raw);
+
+  if (!is_numeric($norm)) {
+    return $default;
+  }
+
+  $val = (float)$norm;
+
+  if ($val < 0) {
+      $val = 0.0;
+  }
+
+  return $val;
+};
+
+$volume1 = $readNumber('volume1', $defaultVolume1);
+$volume2 = $readNumber('volume2', $defaultVolume2);
+$price   = $readNumber('price',    $defaultPrice);
+
+$totalVolume  = $volume1 + $volume2;
+$costFill1    = $volume1 * $price;
+$costFill2    = $volume2 * $price;
+$totalCost    = $totalVolume * $price;
+
+$fmtCostFill1 = number_format($costFill1, 2, ',', '.');
+$fmtCostFill2 = number_format($costFill2, 2, ',', '.');
+$fmtTotalCost = number_format($totalCost,  2, ',', '.');
+$fmtPrice     = number_format($price,      3, ',', '.');
 ?>
 <!DOCTYPE html>
-<html lang="de">
+<html lang="en">
   <head>
     <meta charset="UTF-8" />
     <meta name="viewport" content="width=device-width, initial-scale=1" />
-    <title>Tankstellenberechnung (Aufgabe 3)</title>
+    <title>Fuel Calculation (Task 3)</title>
     <link rel="stylesheet" href="css/style.css" />
   </head>
   <body>
-    <h1>Tankstellenberechnung</h1>
+    <h1>Fuel Calculation</h1>
     <nav>
-      <p><a href="index.php">Start</a> | <a href="info.php">PHP Info</a></p>
+      <p><a href="index.php">Home</a> | <a href="info.php">PHP Info</a></p>
     </nav>
 
-    <p>Füllung 1: <?= $liter1 ?> L</p>
-    <p>Füllung 2: <?= $liter2 ?> L</p>
-    <p>Gesamtmenge: <?= $gesamtLiter ?> L</p>
+    <form action="test.php" method="get" class="calc-form" style="margin-bottom:1rem; display:grid; gap:0.5rem; max-width: 420px;">
+      <label>
+        Fill 1 (L)
+        <input type="number" name="volume1" step="0.1" min="0" value="<?= htmlspecialchars((string)$volume1, ENT_QUOTES) ?>">
+      </label>
+      <label>
+        Fill 2 (L)
+        <input type="number" name="volume2" step="0.1" min="0" value="<?= htmlspecialchars((string)$volume2, ENT_QUOTES) ?>">
+      </label>
+      <label>
+        Price per liter (€)
+        <input type="number" name="price" step="0.001" min="0" value="<?= htmlspecialchars((string)$price, ENT_QUOTES) ?>">
+      </label>
+      <div style="display:flex; gap:0.5rem;">
+        <button type="submit">Calculate</button>
+        <a href="test.php" style="display:inline-block; padding:0.25rem 0.5rem; border:1px solid #ccc; border-radius:4px; text-decoration:none;">Reset</a>
+      </div>
+      <small>Note: Comma as decimal separator is allowed (e.g., 40,5).</small>
+    </form>
 
-    <p>Kosten Füllung 1: <?= $fmtK1 ?> €</p>
-    <p>Kosten Füllung 2: <?= $fmtK2 ?> €</p>
-    <p>Gesamtkosten: <strong><?= $fmtKG ?> €</strong></p>
+    <p>Fill 1: <?= $volume1 ?> L</p>
+    <p>Fill 2: <?= $volume2 ?> L</p>
+    <p>Total volume: <?= $totalVolume ?> L</p>
+
+    <p>Price per liter: <?= $fmtPrice ?> €</p>
+    <p>Cost fill 1: <?= $fmtCostFill1 ?> €</p>
+    <p>Cost fill 2: <?= $fmtCostFill2 ?> €</p>
+    <p>Total cost: <strong><?= $fmtTotalCost ?> €</strong></p>
 
     <table class="calc">
       <thead>
-        <tr><th>Bezeichnung</th><th>Wert</th></tr>
+        <tr><th>Label</th><th>Value</th></tr>
       </thead>
       <tbody>
-        <tr><td>Füllung 1 (L)</td><td><?= $liter1 ?></td></tr>
-        <tr><td>Füllung 2 (L)</td><td><?= $liter2 ?></td></tr>
-        <tr><td>Gesamt (L)</td><td><?= $gesamtLiter ?></td></tr>
-        <tr><td>Kosten Füllung 1 (€)</td><td><?= $fmtK1 ?></td></tr>
-        <tr><td>Kosten Füllung 2 (€)</td><td><?= $fmtK2 ?></td></tr>
-        <tr><td>Gesamtkosten (€)</td><td><strong><?= $fmtKG ?></strong></td></tr>
+        <tr><td>Fill 1 (L)</td><td><?= $volume1 ?></td></tr>
+        <tr><td>Fill 2 (L)</td><td><?= $volume2 ?></td></tr>
+        <tr><td>Total (L)</td><td><?= $totalVolume ?></td></tr>
+        <tr><td>Price per liter (€)</td><td><?= $fmtPrice ?></td></tr>
+        <tr><td>Cost fill 1 (€)</td><td><?= $fmtCostFill1 ?></td></tr>
+        <tr><td>Cost fill 2 (€)</td><td><?= $fmtCostFill2 ?></td></tr>
+        <tr><td>Total cost (€)</td><td><strong><?= $fmtTotalCost ?></strong></td></tr>
       </tbody>
     </table>
   </body>

Bezeichnung	Wert
Label	Value
Füllung 1 (L)
Füllung 2 (L)
Gesamt (L)
Kosten Füllung 1 (€)
Kosten Füllung 2 (€)
Gesamtkosten (€)
Fill 1 (L)
Fill 2 (L)
Total (L)
Price per liter (€)
Cost fill 1 (€)
Cost fill 2 (€)
Total cost (€)