JSFiddle - React, Tailwind, and code Playground

HTML

<input type="text" id="number" />
<button id="calculator">Calculate!</button>

<br />
<strong>Result: <span id="calculation_result"></span></strong>

JavaScript

$(document).ready(function(){
    $("#calculator").click(function(){
        var number = $("#number").val();
        $("#calculation_result").html(multiples_of_3_or_5(number));
    })
    
    function multiples_of_3_or_5(number){
        // WRITE YOUR CODE HERE
    }
    
});