Kodowanie klasycznej siatki w HTML

<div class="container">
  <div class="cell cell-1">1.</div>
  <div class="cell cell-2">2.</div>
  <div class="cell cell-3">3.</div>
  <div class="cell cell-4">4.</div>
  <div class="cell cell-5">5.</div>
  <div class="cell cell-6">6.</div>
  <div class="cell cell-7">7.</div>
  <div class="cell cell-8">8.</div>
  <div class="cell cell-9">9.</div> 
</div>
Clean Caterpillar