How can i multiply 'key' in meta query? It is number field and i need automatically multiply value by 25. Thi is my current code: if (isset($_POST['price_max']) && !empty($_POST['price_max'])) { $price_max = sanitize_text_field($_POST['price_max']); $meta_query[] = array( 'relation' => 'OR', // Případ pro ČR (cena v CZK) array( 'key' => 'cena_podniku', 'value' => $price_max, 'type' => 'numeric', 'compare' => '<=', ), // CZK TO EUR array( 'relation' => 'AND', array( 'key' => 'cena_podniku', 'value' => $price_max, 'type' => 'numeric', 'compare' => '<=', ), array( 'key' => 'zeme', 'value' => array('ČR'), 'compare' => 'NOT IN', ) ), ); } And what i need to do is change value of key 'key' => 'cena_podniku', somehow like this 'key' => 'cena_podniku' * 25.