JSFiddle - React, Tailwind, and code Playground

HTML

<div class="container">
  <div class="fixed-width">
    <p>Hi</p>
    <p>Hi</p>
    <p>Hi</p>
    <p>Hi</p>
  </div>
  <div class="overflow-text"><p>This is some text that is really long.</p></div>
</div>

CSS

.container {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
}

.fixed-width {
  width: 200px;
  border: 1px solid red;
}

.fixed-width,
.overflow-text {
  display: flex;
  justify-content: space-around;
}

.overflow-text {
  flex-grow: 1;
  border: 1px solid red;
}