<ul class="grid">
  <li><h2>One</h2></li>
  <li><h2>Two</h2>
    <p>You really can't count on how tall things are going to be on the web.</p>
 
  </li>
  <li><h2>Three</h2></li>
  <li><h2>Four</h2></li>
  <li><h2>Five</h2></li>
  <li><h2>Six</h2></li>
</ul>

* {box-sizing: border-box;}

body {
  padding: 2em;
  background-color: rgb(192,181,129);
  color: #333;
  font: 1rem 'Life Savers', cursive;
}

.grid {
  border: 5px solid #fff;
  max-width: 800px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-template-rows: repeat(3, minmax(100px, auto));
  list-style: none;
  margin: 2em auto;
  padding: 0;
  gap: 5px;
}

.grid li {
  background-color: rgba(255,255,255,.5);
  padding: 1em;
  font-weight: bold;
}

.grid li:nth-child(3) {
  grid-row: span 3;
}

.grid li:nth-child(6) {
  grid-column: span 2;
}

h2 {
  margin-top: 0;
}