calcsimple

HTML

<div id="input" data-input>input calculation query <textarea rows="2" cols="10"></textarea><button>=</button><br></div>
<div id="output" data-output>answer:</div>

JavaScript

("data-input").click = () => {
    var userInput = ("textarea");
    console.log(userInput);
    document.getElementById("output").innerHTML = userInput;
    return userInput;
};