JSFiddle - React, Tailwind, and code Playground

HTML

<div class="row">
  <div class="block_tall"></div>
  <div class="container">
    <div class="block block1">ghgh</div>
    <div class="block block2">hjhjh</div>
  </div>
</div>

CSS

.row{
  display: flex;
}

.block_tall{
  background-color: #f90;
  height: 300px;
  width: 50%;
}

.container{
  width: 50%;
}

.block{
  background-color: red;
  height: 150px;
  width: 100%;
}