JSFiddle - React, Tailwind, and code Playground

HTML

<div class="container">

<div class="buttons">
 <button>
 test
 </button>
 <button>
 test
 </button>
 <button>
 test
 </button>
 <button>
 test
 </button>
</div>
<button class="outer">
test
</button>
</div>

CSS

.container{
  display:flex;
  width:100%
}
.buttons{
  display: flex;
    width: 75%;
    justify-content: space-between;
}
button{
}
.outer{
  margin-left:auto
}