<div class="container">
  <div class="item">
    <h2>Etiam ultricies nisi</h2>
    <p>
      Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Aenean commodo ligula eget dolor.
    </p>
  </div>
  <div class="item">
    <h2>Etiam ultricies nisi</h2>
    <p>
      Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Aenean commodo ligula eget dolor.
    </p>
  </div>
  <div class="item">
    <h2>Etiam ultricies nisi</h2>
    <p>
      Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Aenean commodo ligula eget dolor.
    </p>
  </div>
  <div class="item">
    <h2>Etiam ultricies nisi</h2>
    <p>
      Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Aenean commodo ligula eget dolor.
    </p>
  </div>
  <div class="item">
    <h2>Etiam ultricies nisi</h2>
    <p>
      Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Aenean commodo ligula eget dolor.
    </p>
  </div>
  <div class="item">
    <h2>Etiam ultricies nisi</h2>
    <p>
      Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Aenean commodo ligula eget dolor.
    </p>
  </div>
</div>

.container {
  display: flex;
  flex-wrap: wrap;
}
.item {
  width: calc(100% / 3 - 60px);
  background: #fdd;
  padding: 20px;
  margin: 10px;
}
h2 {
  font-size: 1.25rem;
  margin-bottom: 1rem;
}
p {
  line-height: 1.4;
}