Let me explain how to add simple facebook like box.
1. Login to your blogger account
2. Click Layout > Add A Gadget.
3. Select HTML / Javascript > Paste The Following Code below
<iframe src="//www.facebook.com/plugins/likebox.php?href=https://www.facebook.com/cambodiarecord855?ref=hl&width=292&height=258&colorscheme=light&show_faces=true&border_color&stream=false&header=false&" style="border:none; overflow:hidden; width:292px; height:258px;" >
4. Replace my facebook page URL with your page URL
5. Change Width And Height According To Your Template.
6. Now save and you are done.

