JSFiddle - React, Tailwind, and code Playground

HTML

<div class="container">
    <div class="box"></div>
    <div class="box"></div>
</div>
<div class="container">
    <div class="box"></div>
    <div class="box"></div>
</div>
<div class="container">
    <div class="box" id="big"></div>
    <div class="box"></div>
</div>

CSS

.container {
    float: left;
}
.box {
    width: 100px;
    height: 25px;
    background-color: grey;
    margin-right: 10px;
    margin-bottom: 10px;
}
#big {
    height: 50px;
}