JSFiddle - React, Tailwind, and code Playground

HTML

<div class="wrap">
  <span class="item">1</span>
  <span class="item">2</span>
  <span class="item">3</span>
  <span class="item">4</span>
  <span class="item">5</span>
</div>

CSS

.wrap{
  display: flex;
  max-width: 500px;
  border: 1px #cc0000 solid;
}

.item {
  flex: 1;
  font-size: 17px;
  text-align: center;
  color: #fff;
  background: #ff8300;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  aspect-ratio: 1/1;
}

@supports not (aspect-ratio: 1/1) {
  .item:before {
    content: "";
    padding-bottom: 100%;
  }
}