If you want to put Facebook comment box inside your blogger website then you can add some code inside HTML and put Facebook comment box.  To add Facebook comment box to Blogger, who has to add code from the cone and the complete information about how to add is given below.

 Before adding anything inside HTML or before changing anything, make sure to backup your Theme or HTML. 
How to put Facebook comment box inside Blogger website?

1.) After logging into Blogger, click on the Theme option.  After clicking on the Theme option, click on the Edit HTML option.

 2.) After clicking on the "Edit HTML" option, the Theme HTML will open.  Now you click anywhere in the HTML area once and press ctrl + f from the keyboard.  After that a search box will open and search for the </body> tag inside it.

 3.) Once the </body> tag is found, copy the code below and paste it above the </body> tag.
<div id="fb-root"></div><script>(function(d, s, id) {var js, fjs = d.getElementsByTagName(s)[0];if (d.getElementById(id)) return;js = d.createElement(s); js.id = id;js.src = "//connect.facebook.net/en_US/sdk.js#xfbml=1&amp;version=v2.3";fjs.parentNode.insertBefore(js, fjs);}(document, 'script', 'facebook-jssdk'));</script>
4.) After this, search the given tag inside the search box.  (Keep in mind when you search this tag, you will find two such tags, both will be exactly the same, you have to leave the first tag and stay on the second tag.)
<b:include data='post' name='post'/>
5.) Now you have to copy the code given below and paste it after the tag "<b: include data = 'post' name = 'post' />".

<b:if cond='data:blog.pageType == "item"'>&lt;divclass=&quot;fb-comments&quot;data-href=&quot;<data:post.url/>&quot;data-width=&quot;600&quot;data-num-posts=&quot;100&quot;&gt;&lt;/div&gt;</b:if>
6.) After pasting both the code inside the HTML, click on the "Save Theme" option and save the theme.  After saving the theme, Facebook blog box will be put in your blogger website.

 So in this way you can put Facebook comment box inside your blogger website.  Tell us how you liked the information given by us by commenting below, and if you want to ask any question from us, then you can also comment by commenting below.