Add a calculater in Microsoft word, Since the equation feature already exist
I'm an Engineer, my major requires a lot of reports and calculations. I think it will save time if while writing my equation in the report with actual numbers it will be automatically calculated instead of calculating it again either manually or with excel. I think the idea is simple but will have a great response and save time for students and other users.
3 comments

SB commented
This functionality is available in most prior versions and current Word 365, by using the 'Calculate' command tool; it covers the calculations for addition, subtraction, multiplication, division, percentages, exponentiation and roots. It calculates of the given highlighted numerical text calculation, and then displays the calculation result on the left lower corner of the Word window in the status bar. It can be added to either/both the Quick Access toolbar or in a new custom ribbon tab. If you just web search 'word hidden calculator', or there is this useful article here (http://www.microknowledge.com/hiddencalculatorword/).
Copy+Paste of excel table into Word doesn't retain calculation formula it seems, but just the text & table format; although functionalities of formulas that are used in Excel can seemingly be used in Word via the formulas function detailed here (https://support.office.com/engb/article/useaformulainawordoroutlooktablecbd0596eea8a485ea35db2cb2c4f3e27) 
James smith commented
Microsoft Office is dependable software that is easy to utilize. It is userfriendly and it is easy to work around. It is easy to make and maintain documents. It is the bundle of amazing programs within which are: MS Word, MS PowerPoint, MS excel, Publisher, Access and all the named here have a very important role for people and companies that have this set of wonderful package.
https://gooff.info/howtosetupoffice/ 
Tom Chan commented
They used to have solve equation in the Mathematics AddIn for Word.