How to move a button under input?

Question

I have a quite weird problem, which I can't find solution on

So basically what I want is to make is to bring button under the input file (I'm using Bootstrap), but have no idea how to do that

<form>
	<input type="text" placeholder="Numer pokoju" name="numerPokoju" required="">
	<input name="csrf" type="hidden" value="46d2ce8a-2271-471f-a46f-c58234324e99">
	<button type="button">
		Sprawdź
	</button>
</form>

here's the visualization on CodePen

Answer 1

Simply, wrap the button and input inside form-group div and voila!

  <div class="form-group">
            <input name="csrf" type="hidden" value="46d2ce8a-2271-471f-a46f-c58234324e99">
  </div>
   <div class="form-group">
            <button type="button">
                Sprawdź
            </button>
  </div>