JSFiddle - React, Tailwind, and code Playground

HTML

<div class="raw">
    <div class="col"></div>
    <div class="col"></div>
    <div class="col"></div>
</div>
<div class="raw">
    <div class="col"></div>
    <div class="col"></div>
    <div class="col"></div>
</div>

CSS

.raw{
     display:table;
    width:100%;
}
.col{
    display:table-cell;
    border:1px solid;
    height: 100px;
}