class="button all-clear">C</div>
          <div class="button last-entity-clear">CE</div>
          <div class="button operation">%</div>
          <div class="button operation">/</div>
          <div class="button number">7</div>
          <div class="button number">8</div>
          <div class="button number">9</div>
          <div class="button operation">x</div>
          <div class="button number">4</div>
          <div class="button number">5</div>
          <div class="button number">6</div>
        