JSFiddle - React, Tailwind, and code Playground

HTML

<div class="box">
    <div class="banner"></div>
    <div class="item"></div>
    <div class="item"></div>
    <div class="item"></div>
    <div class="item"></div>
    <div class="item"></div>
    <div class="item"></div>
    <div class="item"></div>
    <div class="item"></div>

</div>

CSS

.box {
    display:block;
}
.item {
    width: 100px;
    height: 100px;
    background: #F00;
    margin: 10px;
    display: inline-block;
    clear: both;
    
}  

.banner {
    width: 200px;
    height:400px;
    background: #0F0;
    display: block;
    float: right;
}