JSFiddle - React, Tailwind, and code Playground

HTML

<div class="tovar" id="41">
    <div class="tovar-price-42">2</div>
    <input class="tovar-count" id="tovar-count-41" type="text" value="2" size="3"><span class="plus"></span><a href="#" class="check">Получить значения "кол-ва" и "цены" для первого товара с id="41"</a>

</div>
<div class="tovar" id="42">
    <div class="tovar-price-42">4</div>
    <input class="tovar-count" id="tovar-count-42" type="text" value="3" size="3"><span class="plus"></span><a href="#" class="check">Получить значения "кол-ва" и "цены" для второго товара с id="42"</a>

</div>

JavaScript

$(document).ready(function () {
    $('.check').click(function () {
        var product_id = this.id;
        alert(product_id);

        var product_amount = $("#tovar-count-" + product_id + "").val();
        product_amount = parseInt(product_amount);
        alert(product_amount);
        
        var product_amount1 = $("#tovar-price-" + product_id + "").text();
        product_amount1 = parseInt(product_amount1);
        alert(product_amount1);



    });
});