How to pass woocommerce product quantity data to contact form?

Question

WooCommerce

How to pass woocommerce item data to contact form?
Now I have a title and a link to the product being transferred-

<!-- hidden input -->
      <input type="hidden" name="item"  value="<?php the_title(); ?>">
      <input type="hidden" name="link"  value="<?php the_permalink(); ?>">

what should be specified in value="?????(); ?>" to get the number of goods selected by the user when clicking on the form? Although there may even need js to pass this data from input. Thank you in advance!