JSFiddle - React, Tailwind, and code Playground

HTML

<div class="dstableBox">
	<div class="cont">
		1번
	</div>
	<div class="cont1">
		<div style='width:100px; background-color:red;'>
		2번
	  </div>
	</div>
</div>

CSS

.dstableBox {display:table;width:100%}
.dstableBox .cont {display:table-cell;width:120px;height:100px;border:1px solid #ddd;box-sizing:border-box;background-color:#fff;vertical-align:middle;text-align:center}
.dstableBox .cont1 {display:table-cell;width:100%;height:100px;border:1px solid #ddd;box-sizing:border-box;background-color:#fff;vertical-align:middle;text-align:center}