How Shopping Cart, Order Summary get quantity value?

I found this page vendor/magento/module-checkout/view/frontend/web/ template/summary/item/details.html <!– /** * Copyright © Magento, Inc. All rights reserved. * See COPYING.txt for license details. */ –> <!– ko foreach: getRegion(‘before_details’) –> <!– ko template: getTemplate() –><!– /ko –> <!– /ko –> <div class=”product-item-details”> <div class=”product-item-inner”> <div class=”product-item-name-block”> <strong class=”product-item-name” data-bind=”html: $parent.name”></strong> <div class=”details-qty”> <span class=”label”><!– ko i18n:…