How do I use a financial calculator to get the red underlined answers-in other words, what do I type in my calculator to get the output of 15,16,18,19, respectively? I am given the info on the picture terminal value example

Terminal Value Example Terminal value at year N = (FCF at N) (1+g)/(WACC-g) Example: the WACC is 10% and you projected free cash flows through 2022 Your projected 2022 free cash flow is 20 and you expect free cash flows beyond year 2022 to grow at an annual rate of 5% The 2022 terminal value for free cash flows in year 2023 and beyond is: 20(1+.05)/(.10-.05) -21/.05420