JSFiddle - React, Tailwind, and code Playground

HTML

<div>
<span class="price_bonus">
<a href="#" class="price">490 &#8381;</a>
</span>
<a href="#" class="bth">Купить пакет</a>
</div>

CSS

*{
  padding: 0;
  margin: 0;
}
body{
  font-family: Tahoma, Arial, sans-serif;
  color: #fff;
  background: #1C1B15;
  user-select: none;
}
a{
	text-decoration: none;
	color: #fff;
}
.price_bonus{
  background: #434543;
  border-right: 2px solid #000;
  float: left;
  font-size: 23px;
  height: 46px;
  opacity: .9;
  overflow: hidden;
  padding-top: 4px;
  text-align: center;
  width: 16%;
  margin-left: 310px;
  display: inline-block;
  cursor: pointer;
}
.bth{
background: #f26402;
border: none;
bottom: 0;
color: #fff;
cursor: pointer;
display: block;
font-size: 23px;
height: 50px;
padding: 0 4%;
position: absolute;
text-align: center;
text-transform: uppercase;
vertical-align: middle;
width: 21%;
z-index: 2;
margin-left: 600px;
margin-top: -50px;
}
.bth:hover{
  background:  #ff7e00;
}