JSFiddle - React, Tailwind, and code Playground

HTML

<div id="a"></div>
<div id="b"></div>
<div id="c"></div>

CSS

div {
    border: 1px solid black;
    background: grey;
}

#a {
    z-index: 2;
    position: absolute;
    left: 0px;
    width: 100px;
    height: 100px;
    border-radius: 50px;
}

#b {
    position: absolute;
    left: 90px;
    width: 200px;
    height: 100px;
    border-radius: 20px;
    border-left-radius: 90px;
}
#c {
    position: absolute;
    border: 0;
    left: 20px;
    width: 100px;
    height: 100px;
    border-radius: 50px;
    background: white;
}