Sorry didnt mean to come off as rude.
www.setileague.org...
N = R* × fp × ne × fl × fi × fc × L
N = The number of communicative civilizations
The number of civilizations in the Milky Way Galaxy whose radio emissions are detectable.
R* = The rate of formation of suitable stars
The rate of formation of stars with a large enough "habitable zone" and long enough lifetime to be suitable for the development of intelligent
life.
fp = The fraction of those stars with planets
The fraction of sun-like stars with planets is currently unknown, but evidence indicates that planetary systems may be common for stars like the
sun.
ne = The number of "Earths" per planetary system
All stars have a habitable zone where a planet would be able to maintain a temperature that would allow liquid water. A planet in the habitable zone
could have the basic conditions for life as we know it.
fl = The fraction of those planets where life develops
Although a planet orbits in the habitable zone of a suitable star, other factors are necessary for life to arise. Thus, only a fraction of suitable
planets will actually develop life.
fi = The fraction life sites where intelligence develops
Life on Earth began over 3.5 billion years ago. Intelligence took a long time to develop. On other life-bearing planets it may happen faster, it may
take longer, or it may not develop at all. For more information, please visit Dr. William Calvin's "The Drake Equation's fi".
fc = The fraction of planets where technology develops
The fraction of planets with intelligent life that develop technological civilizations, i.e., technology that releases detectable signs of their
existence into space.
L = The "Lifetime" of communicating civilizations
The length of time such civilizations release detectable signals into space.


