Ahmadkhan02

<div class="stage">
  <div class="display" id="result">
  </div>
  <div class="toprow">
    <button class="button" id="clr">AC</button>
    <button class="button" id="bks"><--</button>
    <button class="button" id="mod">%</button>
    <button class="button" id="div">/</button>
  </div>
  <div class="middlerow">