Dear Sergey,
Thanks.
I have an online calculator which, using only the fine structure constant, the Rydberg constant and c; can calculate theoretical values for the physical constants with extremely high precision. I put your strong gravity formula on this site and using alpha = 137.035999074, I get Gs = 1.5141729346e+29 (as c has a fixed value and Rydberg is known to 12 digits, precision is limited only by alpha). You can check your formula at this site: physical constants calculator
You can also relate G with Gs - using these formulas to break down G and Gs to their component parts helps to determine their actual structure and function: Alpha and sqrt of Planck momentum
You may also find the online gravitational wave calculator useful. It is also very precise: gravitational wave calculator
Let me know if there are any other formulas you want me to look at.
Cheers, Malcolm