Literally the Drake Equation.

The Drake equation endeavors to estimate the number of dynamic and intelligent lifeforms in the Milky Way galaxy by examining the likelihood of any communication from outer space. It is also the argument that tries to find the number of extraterrestrial civilizations in the alien world. By trying to answer the mystery of intelligent life in the vast universe, the equation consists of many variables. These variables are explained below.

N = R • fp • ne • fl • fi • fc • L*

N= is the quantity of dynamic civilizations in the Milky Way cosmic system with perceptible electromagnetic discharges.

R*= considers the rate at which stars are shaped that are appropriate for the presence of intelligent life

fp = this variable builds up the likelihood of such stars that could have a planetary system

ne= this is the quantity of planets that have an appropriate domain to help life, per nearby planetary group

fl = is the portion of reasonable planets where life can show up

fi= is the fraction of life-bearing planets on which advanced civilizations with intelligence can exist

fc= the fraction of intelligent life and civilization that has developed technology that can be detected in space to alert on their existence

L= the period length of which such intelligent civilization can release detectable radial signals in space