JSFiddle - React, Tailwind, and code Playground
HTML
<!DOCTYPE html>
<html>
<body>
<div id="this_can_be_updated">
Hello.<br/>
This is some text. I need to put in the third line<br/>
the number
</div>
<input type="text" value="5">
</body>
</html>
CSS
#this_can_be_updated {display:inline}