how to put col-lg-4 and col-md-6 code example

Example 1: bootstrap grids examples

<div class="container">
  <div class="row">
    <div class="col-md-8">.col-md-8</div>
    <div class="col-md-4">.col-md-4</div>
  </div>
</div>

Example 2: whatever by Clever Crane on May 31 2020 Donate

<div class="col-lg-3 mb-4">