JSFiddle - React, Tailwind, and code Playground

HTML

<div id="itogo">
    <input type="number" id="js_quantity" value="1">
	<div class="js_prise_block">
	<span>Цена: </span>
  <span id="js_prise">10</span>
  <span> руб.</span>
	</div>
</div>
<div class="js_itogo_text">
<span>Всего товаров на сумму: </span>
<span id="js_summa">10</span>
<span> руб.</span>
</div>

JavaScript

$('#itogo').change(function () {
        var quantityX = ($("input[id='js_quantity']").val());
        var priseY = document.getElementById("js_prise").innerHTML;
        var summ = quantityX * priseY;
        $('#js_summa').text(summ);
    });

 	    $('#itogo').keyup(function () {
        var quantityX = ($("input[id='js_quantity']").val());
        var priseY = document.getElementById("js_prise").innerHTML;
        var summ = quantityX * priseY;
        $('#js_summa').text(summ);
    });
	
	
	 	    $('#itogo').click(function () {
        var quantityX = ($("input[id='js_quantity']").val());
        var priseY = document.getElementById("js_prise").innerHTML;
        var summ = quantityX * priseY;
        $('#js_summa').text(summ);
    });