                  <div class="input-group">
                        <label for="coats">Number of Coats:</label>
                        <input type="number" id="coats" required>
                    </div>
                    <div class="input-group">
                        <label for="coveragePerLiter">Paint Coverage (sqm per liter):</label>
                        <input type="number" id="coveragePerLiter" required>
                    </div>
                </div>
                <button type="b