<div class="clearfix">
  <div class="floated">float a</div>
  <div class="floated">float b</div>
  <div class="floated">float c</div>
</div>
<style>
  .clearfix::after {
    content: '';
    display: block;
    clear: both;
  }
  .floated {
    float: left;
  }
</style>