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<!DOCTYPE html>
<html>
<head>
<style>
body {
  background-color:#E7E9EB;
}
#myDIV {
  height:300px;
  grid-template-columns: auto auto auto;
  grid-template-rows: auto auto;
  display: grid;
  gap: 10px;
  background-color: #2196F3;
  padding: 10px;
  grid-auto-rows: max-content;  
}
#myDIV div {
  background-color: rgba(255, 255, 255, 0.8);
  text-align: center;
  padding: 20px 0;
  font-size: 30px;
}
.item1 { grid-area: 1 / 1 / 2 / 2; }
.item2 { grid-area: 1 / 2 / 2 / 3; }
.item3 { grid-area: 1 / 3 / 2 / 4; }
.item4 { grid-area: 2 / 1 / 3 / 2; }
.item5 { grid-area: 2 / 2 / 3 / 3; }
.item6 { grid-area: 2 / 3 / 3 / 4; }
</style>
</head>
<body>
<h1>The grid-auto-rows property</h1>
<div id="myDIV">
  <div class="item1">1<br>Hello</div>
  <div class="item2">2</div>
  <div class="item3">3</div>
  <div class="item4">4</div>
  <div class="item5">5</div>
  <div class="item6">6</div>
</div>
</body>
</html>