Need to add many different calculators on my wordpress site

I am looking for a freelancer to add N number of calculators to my WordPress site. The pages needed to include different calculator templates which we will provide you. The types of calculators are like mortgage calculators, BMI calculators, estimation, loan calculators, and many others.

Requirements:
- The calculators should have specific functionalities based on my requirements.
- The design style for the calculators should be modern which will be discussed with you with some website page examples.
-We will give you templates for all calculators but you have to embed them in the individual page and must estimate correctly. The result of the cal must match the calculations without any error or false results.
- After Embed page must remain mobile friendly.

What will be your task as a freelancer:
1. You will edit the WordPress page, insert the cal template, and check whether the calculating result is correct changing script values if needed.
2. You will see whether the page opens nicely on mobile and remove any unused script for fast browsing.
If everything is working fine as per the requirement, you are done!