CSS Grid - Number of Columns can be different in the first row than second row [duplicate]

Answer 1

This is what I wanted actually.

section {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-gap: 5px;
}

div {
  height: 50px;
  background: red;
}
div:first-child {
  grid-column: 1 / 3;
}

  
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