JSFiddle - React, Tailwind, and code Playground

HTML

<div class="wrap">
	<div class="top">4</div>
	<div class="bottom">15</div>
</div>

CSS

.top {
  display: block;
  float: left;
  font-size: 60px;
  font-weight: 700;
}

.bottom {
  display: block;
  float: left;
  font-size: 38px;
  font-weight: 700;
  margin-top: 70px;
  position: relative;
  width: 28px;
}

.bottom:before {
  border-left: 1px solid;
  content: "";
  height: 66px;
  position: absolute;
  right: 0;
  top: -35px;
  -webkit-transform: skew(-45deg);
  -webkit-transform-origin: left top 0;
  width: 0;
}