This is pretty contrived but it took less than 10 minutes and required 0 googling:

https://jsbin.com/nedesuvozo/edit?html,output

The important two css classes:

    .Example--outer-container {
      display: flex;
      flex-direction: row;
    }
    
    .Example-three-column-inner-container {
      width: 33.333%;
    }

Browser support: https://caniuse.com/#feat=flexbox