JSFiddle - React, Tailwind, and code Playground

HTML

<div id="content">
    <div class="item"></div>
    <div class="item"></div>
    <div class="item"></div>
    <div class="item"></div>
    <div class="item"></div>
    <div class="item"></div>
    <div class="item"></div>
</div>

CSS

#content {
    margin: 0px auto;
    margin-top: 10px;
    border: 1px solid;
    width: 920px;
}
.item {
    display: block;
    width: 220px;
    height: 250px;
    border: 1px solid;
    margin-left: 6px;
    margin-bottom: 5px;
    float: left;
}

#content:after
{
    content:"";
    clear:left;
    display: block;
}