JSFiddle - React, Tailwind, and code Playground

HTML

<div>
  <div class="something">
    Text
  </div>
  <div class="something-else">
    Something fixed
  </div>
</div>
<div>
  <div class="something">
    Text
  </div>
  <div class="something-else">
    Something fixed
  </div>
</div>

CSS

.something {
  display: inline-block;
 }
  
 .something-else {
   display: inline-block;
   width: calc(100% - 200px);
  }