Hello Aspirant,

For making scientific calculations easier, you could use a scientific calculator available in the market along with its booklet containing instructions for how to use it and simplify those calculations in one go.

For more help, you can also take help of multiple YouTube videos available which helps students  by demonstrating how to simplify those scientific calculations and the process.

Eventually, if you don't get the simplification of those calculations any where, then you can also contact and ask your subject teacher or mentor to tell you the process and ways to master it .

Hope that helps. Good luck