JSFiddle - React, Tailwind, and code Playground

HTML

<table>
  <tbody>
    <tr>
      <td>A</td>
      <td rowspan="3">B</td>
      <td>C</td>
    </tr>
    <tr >
      <td >A1</td>
      <td rowspan="2">C1</td>
    </tr>
    <tr>
      <td>A2</td>
    </tr>
  </tbody>
</table>

CSS

table{
  width:100%;
}
table tr{
  width:33%;
}
table td{
  background: #ccc;
}