css - div高度问题

Question

如何让 div id="left"像 div right_up 和 right_down 一样高度相等？

    <div style="width: 1050px;">
    <div id="left" style="width: 80%;height:80%;min-height: 80%;float: left; background-color: blueviolet;">a</div>
    <div id="right_up" style="width: 20%;height:40%;min-height: 40%; float: left; background-color: yellow;">
        <p>some text using paragraphs</p><p>some text</p>
        <ul>
            <li>some text using lists</li>
            <li>some text</li>
        </ul>
    </div>
    <div id="right_down" style="width: 20%;min-height: 40%;height:40%; float: left; background-color: aqua; margin-left: 80%;">
        <p>some text using paragraphs</p><p>some text</p>
        <ul>
            <li>some text using lists</li>
            <li>some text</li>
        </ul>
    </div>
</div>

Answer 1

对我来说删除

margin-left: 80%;

来自 div id="right_down"