JSFiddle - React, Tailwind, and code Playground

HTML

<div class="product_container">
    <div class="outer-center">
        <div class="product inner-center">
        </div>
    </div>
    <div class="clear"></div>
</div>

CSS

.product_container {
    border: 1px solid black; 
    overflow: auto;
}

.outer-center {
    border: 1px dotted blue;
    float: right;
    right: 50%;
    position: relative;
    
}

.inner-center {
    border: 1px solid green;
    width: 50px;
    height: 50px;
    float: right;
    right: -50%;
    position: relative;
}