How to add a widget to your Blogger Blog post?
1) Navigate to your Blogger dashboard.
2) Underneath "Manage Blog", click "Design".
3) Click "add a gadget" where you'd like the widget to appear.
4) A pop-up should appear. Scroll down to "HTML / Javascript".
5) Click the "+" next to it.
6) Copy-paste the widget code into the box and save.