<div class="grid">
<div><p>column 1<br />row 1</p></div>

<div><p>column 2<br />row 1</p></div>

<div><p>column 3<br />row 1</p></div>

<div><p>column 1<br />row 2</p></div>

<div><p>column 2 & 3<br />row 2</p></div>
</div>

.grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 1rem;
}

.grid div {
  background-color: rgb(19 78 74 / 0.1);
  padding: 1rem;
}

.grid div:nth-child(5) {
  grid-column: 2 / span 2;
}

.grid p {
  color: rgb(55 65 81);
  margin: 0;
  font-size: 0.75rem;
}