type="button">.</button>
          </div>
        </div>
      </div>
    </div>

    <p>With a non-empty display.</p>

    <div class="calculator">
      <div class="calculator__display">
        <div class="display">
          <div class="display__line1">22÷7=3.(142857)</div>
          <div class="display__line2">3.(142857)</div>
        </div>
      </div>
      <div class="calculator__pad">
        <div class="pad">
          <div class="pad__slot r0 c0 colspan2">
            <button class="key key--pr