That is not a formula; it is just numbers that you assert with no justification. How does your formula deal with variables like death/ birth rates? Where is the supporting evidence for the numbers you use?
Final Conclusion: That there were no families of Humans multiplying on the Earth 70 thousand years ago is evident, because of the fact that all things the Humans have done to the place called Earth during a single cluster of 7 thousand years, or when Earth’s population was 1 million persons, they would have done the same thing anyway during any of the three sequences of 14 thousand years that immediately precede the recent 7 thousand years.
Only if you ignore the fact that the technology for the advancements that humanity has accomplished has only been available for the past 200 years.
'Qui non intelligit, aut taceat, aut discat' The mind is like a parachute. It only works when it is open.-FZ The industrial revolution, flipped a bitch on evolution.-NOFX