<div class="grid">
  <div style="
    grid-column: 1 / 3;
    grid-row: 2 / 3;
  ">
  </div>
  <div style="
    grid-column: 3 / -1;
    grid-row: 1 / 2;
  ">
  </div>
  <div style="
    grid-column: 3 / 4;
    grid-row: 2 / 4;
  ">
  </div>
</div>
.grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-template-rows: repeat(3, 1fr);
  grid-gap: 10px;
  background: #eee;
  border: 1px solid #ccc;
  padding: 10px;
}

.grid > div {
  min-height: 100px;
  background: white;
  display: grid;
  place-items: center;
}
.grid > div::after {
  content: attr(style);
  white-space: pre-wrap;
}
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