Convert this JavaScript code to jQuery
<p>I am new to jQuery, so I'm having trouble solving this. I want this converted to jQuery.</p>

<p><strong>JavaScript:</strong></p>

<pre><code>var el = document.getElementById("box");
el.style.backgroundColor = "#0000000";
var new_el = document.createElement("div");
new_el.innerHTML = "&lt;p&gt;some content&lt;/p&gt;";
el.appendChild(new_el);
</code></pre>
