Woocommerce Order Quantity in Multiples

I want the number of products in the customer cart to be a multiple of 6 or 12 or 4. I found this code for multiplier 6 in the forum, but it needs to be edited for other coefficients.

// check that cart items quantities totals are in multiples of 6
add_action( 'woocommerce_check_cart_items', 'woocommerce_check_cart_quantities' );
function woocommerce_check_cart_quantities() {
    $multiples = 6;
    $total_products = 0;
    foreach ( WC()->cart->get_cart() as $cart_item_key => $values ) {
        $total_products += $values['quantity'];
    }
    if ( ( $total_products % $multiples ) > 0 )
        wc_add_notice( sprintf( __('You need to buy in quantities of %s products', 'woocommerce'), $multiples ), 'error' );
}

// Limit cart items with a certain shipping class to be purchased in multiple only
add_action( 'woocommerce_check_cart_items', 'woocommerce_check_cart_quantities_for_class' );
function woocommerce_check_cart_quantities_for_class() {
    $multiples = 6;
    $class = 'bottle';
    $total_products = 0;
    foreach ( WC()->cart->get_cart() as $cart_item_key => $values ) {
        $product = get_product( $values['product_id'] );
        if ( $product->get_shipping_class() == $class ) {
            $total_products += $values['quantity'];
        }
    }
    if ( ( $total_products % $multiples ) > 0 )
        wc_add_notice( sprintf( __('You need to purchase bottles in quantities of %s', 'woocommerce'), $multiples ), 'error' );
}