JSFiddle - React, Tailwind, and code Playground

HTML

<article>
  <section>
    <p>Box with Contant A</p>
    <p>Box with Contant B</p>
  </section>
  <section>
      <p>Box with Contant C</p>
  </section>
</article>

CSS

article {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
}

article > section {
  display: flex;
}

article > section:first-Child {
  flex-direction: row;
  flex: 1;
  justify-content: space-around;
}

article > section:last-Child {
  flex: 3;
  justify-content: center;
}

p {
  margin: 1em;
  padding: 1em;
  white-space: nowrap;
  text-align: center;
  background-color: lightgreen;
}