.
They want you calculate
P = = = .
You can do it "manually" using your calculator or computer.
Or, as alternative, you can do it with TECHNOLOGY, using Microsoft Excel in your computer or specialized web-site/web-sites.
If you use MS Excel, copy the last formula into MS Excel cell and press the "Enter" button.
You will get the answer P = 0.200121 immediately and momentarily.
If you want to use web-site/web-sites, go to one of specialized web-sites
https://stattrek.com/probability-distributions/binomial.aspx
http://onlinestatbook.com/2/probability/binomial.html
with free of charge solvers, read instructions there and do your work.
Happy calculations (!)