String taken from database table post_meta is showing HTML tags on Frontend

I have saved a string in post_meta table in wordpress database with html entities like-

<p>Hello <b>Shashank</b>, I have an idea.</p>

When I get this string on frontend using function

get_post_meta(get_the_id(),field_name, true).

It echoes string with HTML entities as same as it stores in DB.

But I want to show this sting as "Hello Shashank, I have an idea."

How can I do this.?