Is there a way to extract a particular value/string from a html tag?

Basically what I want to do is take a string or number and display it on my website.

For instance, say there was a bit of code from a webpage that read as followed:

<div>
<p>89</p>
</div>

Would there be a way to take that number (89) and display it in your own html document? So that if the number ever updated the number on my website would update along with it.