Create a square from user inputs

Question

I am attempting to create a square from user inputs.

I thought that having having the height and width in my style multiplied together would create the square after clicking my button.

My question is: How do I get the user inputs to be used for the height and width of the box?

HTML:

<input type="text" id="width">
<input type="text" id="height">
    
<button onclick="calculate()">Click Me For Square</button>
<br>
<p id="box"></p>

Javascript:

    function calculate() {
        var w = document.getElementById("width").value;
        var h = document.getElementById("height").value;
        box = document.getElementById("box");
        box.innerHTML = " " + (w*h);
    }
    
    var square = document.createElement('div');
        square.className = 'square';
        document.body.appendChild(square);  

Style

 background: red;
  width: (h*w);
  height: (w*h);
  margin: 50px auto;
}

Answer 1

set square.style.width/height with the input values like below demo:

 function calculate() { var w = document.getElementById("width").value; var h = document.getElementById("height").value; box = document.getElementById("box"); box.innerHTML = " " + (w*h); document.querySelectorAll('div.square').forEach(item => item.remove()) var square = document.createElement('div'); square.className = 'square'; square.style.width = w + 'px' // width square.style.height = h + 'px' // height document.body.appendChild(square); }

 .square { background: red; }

 <input type="text" id="width" value="25"> <input type="text" id="height" value="25"> <button onclick="calculate()">Click Me For Square</button> <br> <p id="box"></p>