console 命令行工具 X clear
console
<div>
  <div style="width:100%;clear:both;">
    <div style="width:200px;height:406px;background-color:yellow;margin:3px;float:right;">
      &nbsp;
    </div>
    <div style="width:200px;height:200px;background-color:red;margin:3px;float:left;">
      &nbsp;
    </div>
    <div style="width:200px;height:200px;background-color:red;margin:3px;float:left;">
      &nbsp;
    </div>
    <div style="width:200px;height:200px;background-color:red;margin:3px;float:left;">
      &nbsp;
    </div>
    <div style="width:406px;height:200px;background-color:green;margin:3px;float:left;">
      &nbsp;
      &nbsp;
    </div>
    <div style="width:200px;height:200px;background-color:red;margin:3px;float:left;">
      &nbsp;
    </div>
  </div>
  <div style="width:100%;clear:both;">
    <div style="width:200px;height:200px;background-color:red;margin:3px;float:left;">
      &nbsp;
    </div>
    <div style="width:406px;height:200px;background-color:orange;margin:3px;float:left;">
      &nbsp;
      &nbsp;
    </div>
    <div style="width:200px;height:400px;background-color:red;margin:3px;float:right;">
      &nbsp;
    </div>
    <div style="width:200px;height:200px;background-color:red;margin:3px;float:left;">
      &nbsp;
    </div>
    <div style="width:200px;height:200px;background-color:red;margin:3px;float:left;">
      &nbsp;
    </div>
    <div style="width:200px;height:200px;background-color:red;margin:3px;float:left;">
      &nbsp;
    </div>
  </div>
</div>