Updated README.md

[yashlikescode]

Issue: #7
Following features added

• Made the heading in center
• Added Badges in the readme file
• Added features of the calculator
• Added a tutorial in form of a GIF

Please feel free to interrupt me if you need any further modification.
Thank you very much.

[jalkanen]

Thank you for this change! It seems you have accidentally added some HTML markup in the Markdown file as well; .md should be Markdown all through. If you would be so kind and address these issues, please?

[yashlikescode]

As you can see in this article: https://gist.github.com/seanh/13a93686bf4c2cb16e658b3cf96807f2
and in many more, using html tags in markdown files is valid and also recommended in some cases.
I have intentionally used html tags, because they provide many more functionalities than the markdown.

But if you still want, I can remove the html tags,
please reply, what should I do