Friends, as it is currently very fashionable, the study of the possible life on other planets, so I present a formula, according to my model, for the adjustment of the maximum vital development (Vp = number of possible planets, according to the chosen scale) to be found in a given set of stars (n) and according to the development scale that we choose Q (0 to 6), as seen in the drawing.
* We use Q (rational numbers) to better fit the intervals.
Vp = (5.n) / 100^Q
As we have said, given a set of stars (n -- for example, a galaxy), Vp would be the number of planets that we would find in that set of stars, and with a vital development according to the scale of values that we wish to adjust, in the drawing Q (from 0 to 6).
Let's give some examples:
A) Given one unknown star n=1,
-- For the existence of simple elements such as CO2, NH3, etc. we would have Vp = (5.n) / 100^Q = 5.1 / 100^0 = 5/1 = 5
That is, in that star we would have 5 planets with natural and primitive gases such as CO2.
-- For the existence of primitive macromolecules we would have the possibility of finding 0.05 Vp = (5.n) / 100^Q = 5.1 / 100^1 = 5/100 = 0.05
B) Given a galaxy similar to ours, 4x10^11 stars.
-- For the stocks of simple elements such as CO2, NH3, etc. we would have Vp = (5x4x10^11) / 100^0 = 20x10^11/1 = 2x10^12 planets with these primitive gases.
--- For the existence of developed animals, even with intelligent life we would have the possibility of finding 2 planets with intelligent life in that galaxy.
Vp = (5x4x10^11)/100^6 = 20x10^11/100^6 = (2x10^12)/(10^12= 2
* That is, all this is a form and way of expressing what we intuit about life on planets, but with a simple formula.

Thank you friends