How to add widget code to blog post?

I am currently using the X Theme

I would like to add the following widget code to a blog post – how would I do that? It seems if I just paste the code into the blog post it doesn’t activate it and just shows it as code.

<script type=”text/javascript” src=”https://files.coinmarketcap.com/static/widget/currency.js”></script&gt;
<div class=”coinmarketcap-currency-widget” data-currencyid=”122″ data-base=”USD” data-secondary=”BTC”></div>

The page I need help with: [log in to see the link]