为什么文本在float：left;不包装？

I have the following HTML

我有以下HTML

<div>
    <img id="image1"
         src="https://valleywag.com/assets/resources/2008/03/BlackGoogleLogo.jpg" 
         alt="Why doesn't this float correcly?"
         style="border-width: 0px; float: left;" />
    <div id="divText" style="font-family: Arial, Helvetica, sans-serif; font-size: 11px;"
          class="txt-Normal">
        <div style="background-color: Green; color: White;">
            <p>
                <strong><span style="font-size: xx-large;">This is going to be big title</span></strong>
            </p>
            <ul>
                <li>
                    <span style="font-size: small;">Foo</span>
                </li>
                <li>
                    <span style="font-size: small;">Bar</span>
                </li>
                <li>
                    <span style="font-size: small;">FooBar</span>
                </li>
                <li>
                    <span style="font-size: small;">BarFoo</span>
                </li>
            </ul>
        </div>
    </div>
</div>
<div>