<ul>
    <li>item1</li>
    <li>item1</li>
    <li>item1</li>
    <li>item1</li>
    <li>item1</li>
    <li>item1</li>
</ul>
Let's say each box is 150px wide, so total width per row is 450px.
What I am trying to do is, automatically make the list allow only 3 boxes (list elements) per row, and not make it go under each other.
I've tried something, and not just asking before trying!
There's my attempt:
<div class="container">
    <ul>
        <li>hreyyy</li>
        <li>hreyyy</li>
        <li>hreyyy</li>
        <li>hreyyy</li>
        <li>hreyyy</li>
        <li>hreyyy</li>
    </ul>
</div>
.container {
    width: 450px;
}
.container ul li {
    width: 150px;
    height: 100px;
    background-color: red;
    float: left;
}
.container ul {
    display: inline;
}
Result:

(source: gyazo.com)
It' doesn't function as I wanted, why?
Is there a plugin for it that makes life easier?