JSFiddle - React, Tailwind, and code Playground

HTML

<input type='checkbox' value='2' name='v'>STS
<br/>
<input type='checkbox' value='4' name='v'>NTV
<br/>
<input class="input1" style="width:350px;" type="text" lang="ru-RU" name="Text_send" id="Text">
<input id="finalcount" value="0" disabled />

JavaScript

$(function () {
    var wordCounts = {};
    $("input[type='text']:not(:disabled)").keyup(function () {
                if(this.value.length > 2){
        var matches = this.value.trim().split(/\s+/);
        wordCounts[this.id] = matches ? matches.length : 0;
        var finalCount = 0;
                    var x = 0; }
        $('input:checkbox:checked').each(function () {
   
            x += parseInt(this.value);
        });
        $.each(wordCounts, function (k, v) {
            finalCount += v * x;
        });           if(this.value.length == 0){
           finalCount = 0;
           x = 0;
        } 
        $('#finalcount').val(finalCount)
    }).keyup();
    $('input:checkbox').change(function () {
        $('input[type="text"]:not(:disabled)').trigger('keyup');
    });
});