JSFiddle - React, Tailwind, and code Playground

HTML

<div class="b b1">div a</div>
<div class="container">
    <div class="b b2">div b</div>
    <div class="b b2">div c</div>
</div>

CSS

.b1 {
    height: 200px;
    width: 200px;
    background: #ff0000;
}
.b {
    display: inline-block;
}
.b2 {
    height: 50px;
    width: 100px;
    background: #343434;
    display: block;
    margin-bottom:5px;
}
.container {
    width: 340px;
    float:right;
}