JSFiddle - React, Tailwind, and code Playground

HTML

<div class="grid-container">
  <div class="col-1">40%</div>
  <div class="col-2">60%</div>
  <div class="col-3">50%</div>
  <div class="col-4">50%</div>
  <div class="col-5">60%</div>
  <div class="col-6">40%</div>
</div>

CSS

.grid-container {
  display: grid;
  grid-auto-columns: 1fr;
  width: 500px;
  grid-auto-rows: 50px;
  grid-gap: 10px;
}

.col-1 {
  grid-column: 1 / span 4;
  grid-row: 1;
}

.col-2 {
  grid-column: 5 / span 6;
  grid-row: 1;
}

.col-3 {
  grid-column: 1 / span 5;
  grid-row: 2;
}

.col-4 {
  grid-column: 6 / span 5;
  grid-row: 2;
}

.col-5 {
  grid-column: 1 / span 6;
  grid-row: 3;
}

.col-6 {
  grid-column: 7 / span 4;
  grid-row: 3;
}

@media ( max-width: 992px ) {
  .grid-container>div {
    grid-column: 1;
    grid-row: auto;
  }
}

/* non-essential demo styles */

.grid-container {
  border: 1px solid black;
  background-color: lightgray;
}
.grid-container > div {
  font-size: 1.3em;
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
}
.grid-container > div:nth-child(odd) {
  background-color: green;
}
.grid-container > div:nth-child(even) {
  background-color: orangered;
}