JSFiddle - React, Tailwind, and code Playground

HTML

<div class="mainDiv">
<div class="leftbody"></div>
<div class="centerbody"></div>
<div class="rightbody"></div>
</div>

CSS

div {
  border-box: box-sizing;
}
.mainDiv {
  display: flex;
  flex-direction: row;
  flex-wrap: nowrap;
  justify-content: flex-start;
}
.mainDiv > div {
  width: 50%;
}
.leftbody {
    height:350px;
    border:1px solid black;
}
.centerbody {
    height:350px;
    border:1px solid black;
}
.rightbody  {
    height:350px;
    border:1px solid black;
}