JSFiddle - React, Tailwind, and code Playground

by kangismet

HTML

<div class='merah'>
    <div class='orange'/>
</div>

CSS

.merah {
    background-color: red;
    width: 250px;
    height: 250px;
}
.orange {
    background-color: orange;
    width: calc(100% - 100px);
    height: calc(100% - 50px);
}