Update Calculator.py

[harshitptl21]

Pull Request Template

script name -

Brief about script

Issue no.(must) -

Self Check(Tick After Making pull Request)

• This issue was assigned to me.
• One Change in one Pull Request
• My file is in proper folder (Name of folder should be in lowercase with no space in between) (E.g. meet_schedular)
• I am following clean code and Documentation and my code is well linted with flake8.
• I have added README.md and requirements.txt (Include version numbers too e.g. pandas==0.0.1) with my script
• I have used REPO README TEAMPLATE (Necessary)
• Just including required dependencies in requirements.txt (Don't include Python version too)

If issue was not assigned to you Please don't make a PR. It will marked as invalid.

[harshitptl21]

Updated comparison operator at corner values.

[AryanGupta0007]

Hey i am new to open source can you please guide me what do i have to do , i want to work on this issue , please help