ต้องการนำค่า ที่คำนวณได้ ลง mysql แบบมีทศนิยมด้วย ซึง code นี้ลงแต่จำนวนเต็มค่ะ

<?php
	$servername = "localhost";
	$username = "ASS";
	$password = "BBB";
	$dbname = "CCC";

$connection = mysqli_connect($servername, $username, $password, $dbname);

if (!$connection) {
    die("Connection failed: " . mysqli_connect_error());
}
$width = $_POST['width']; 
$height = $_POST['height']; 
// คำนวณตารางเมตร
$squareMeter = $width * $height;
$systemId = 1;  // ดึงจาก system_id 1 =5000 บาท
$query = "SELECT price_per_sqm FROM price_systems WHERE system_id = ?";
$stmt = mysqli_prepare($connection, $query);
mysqli_stmt_bind_param($stmt, 'i', $systemId);
mysqli_stmt_execute($stmt);
$result = mysqli_stmt_get_result($stmt);
if ($result && mysqli_num_rows($result) > 0) {
    $row = mysqli_fetch_assoc($result);
    $pricePerPiece = $row['price_per_sqm'] * $squareMeter;   
    $quantity = 1;  // 1 ชุด
    $totalPrice = $pricePerPiece * $quantity;
    $profitMargin = 15; // สมมุติ 15%
    $date = date('Y-m-d H:i:s'); 
		$insertQuery = "INSERT INTO price_calculate (system_id, width, height, square_meter, quantity, price_per_piece, total_price, profit_margin, date)
		VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?)";
		$insertStmt = mysqli_prepare($connection, $insertQuery);		 
		mysqli_stmt_bind_param($insertStmt, 'iddiiddis', $systemId, $width, $height, $squareMeter, $quantity, $pricePerPiece, $totalPrice, $profitMargin, $date);
		$insertResult = mysqli_stmt_execute($insertStmt);
    if ($insertResult) {
        echo "Record inserted successfully into price_calculate table.";
    } else {
        echo "Error inserting record: " . mysqli_error($connection);
    }
} else {
    echo "No pricing information found for the specified system ID.";
}
// Close the database connection
mysqli_close($connection);
?>