JSFiddle - React, Tailwind, and code Playground

HTML

<div class="container">
	
	<div class="item">
		<div class="cube">6</div>
	</div>
	
	<div class="item">
		<div class="cube">2</div>
	</div>
	
	<div class="item">
		<div class="cube">5</div>
	</div>
	
	<div class="item">
		<div class="cube">3</div>
	</div>
	
	<div class="item">
		<div class="cube">4</div>
	</div>
	
	<div class="item">
		<div class="cube">1</div>
	</div>
	
</div>

CSS

* {
	margin: 0;
	padding: 0;
	-webkit-box-sizing: border-box;
	-moz-box-sizing: border-box;
	box-sizing: border-box;
}

.container {
	display: flex;
	flex-wrap: wrap;
	justify-content: center;
	width: 270px;
	margin: 0 auto;
}
.item {
	display: flex;
	justify-content: center;
	margin: 10px;
}
.item:nth-child(1),
.item:nth-child(5),
.item:nth-child(6) {
	width: 100%;
}
.item:nth-child(2),
.item:nth-child(3),
.item:nth-child(4) {
	width: calc(100% / 3 - 20px); 
}

.cube {
	display: flex;
	justify-content: center;
	align-items: center;
	width: 70px;
	height: 70px;
	-webkit-border-radius: 10px;
	-moz-border-radius: 10px;
	border-radius: 10px;
	border: 2px solid #000;
}