<div class="box">
  <div>1</div>
  <div class="big">2</div>
  <div class="big">3</div>
  <div>4</div>
  <div>5</div>
  <div>6</div>
  <div>7</div>
  <div>8</div>
  <div>9</div>
  <div>10</div>
</div>
* {
  padding: 0;
  margin: 0;
  box-sizing: border-box;
}

.box {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr 1fr;
  grid-gap: 4px;
  grid-auto-flow: dense;
}

.box > div {
  background-color: tomato;
  color: white;
  font-size: 1.5em;
  padding: 18px;
  width: 20vw;
  text-align: center;
  font-family: monospace;
}

.box > div.big {
  width: 40vw;
  grid-column-end: span 2;
}

External CSS

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External JavaScript

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