JSFiddle - React, Tailwind, and code Playground

HTML

<div class="barchik">
</div>
<p></p>
<div class="barchik1">
</div>

CSS

.barchik {
  width:200px;
  height:100px;
  background-color:red;
  border-radius:0 0 .5rem 1.5rem;
}

.barchik1 {
  width:200px;
  height:100px;
  background-color:red;
  border-radius:0 0 30px 30px/0 0 50px 50px;
}