Added matrix multiplication calculator

[Samiksha-Garg]

Related Issue

• There didn't exist any calculator to carry out matrix multiplication

Fixes: #685

Describe the changes you've made

Initially I resolved the issue that arose due to conflicting CSS, after merging two of my PRs. Then I added the complete functionality of matrix multiplication calculator under matrices topic. I made use of interweave library to convert string to HTML object.

Checklist:

• [x] My code follows the style guidelines of this project.
• [x] I have performed a self-review of my own code.
• [x] I have commented my code, particularly in hard-to-understand areas.
• [ ] I have made corresponding changes to the documentation.
• [ ] My changes generate no new warnings.

Screenshots

Orignal :

Updated :

[github-actions[bot]]

Our team will soon review your PR. Thanks @Samiksha-Garg :)

[Amit366]

@Samiksha-Garg did u change some words in the definition or u directly copied it?

[Samiksha-Garg]

@Samiksha-Garg did u change some words in the definition or u directly copied it?

I had made changes!

[github-actions[bot]]

Thank you @Samiksha-Garg for taking out your valuable time in order to contribute to our project. Looking forward for more such amazing contributions :).

[Amit366]

@Samiksha-Garg on merging there was merge conflicts so pull again and then send the pull request