"The rooster's are out of the coop!" (me to myself.)
"I'll get you my pretty! If it's the last thing I do!!! HEHEHEHEHEHEH!!!!!" (me to the chickens we are babysitting)
The whole story is that, while we were petsitting the neighbor's chickens, one of them escpaed. So I, being the quick...
The more advanced chicken math are things like the KFC principle, which states that roosters should actually be subtracted, because they may kill your other chickens.
Don't forget that 1+1 = 14. See, if you have one hen, and you add a rooster, you get 12 young pullets and cockerels, 1 hen, and 1 rooster. Or that your flock + new chicks always equals your flock + x, x meaning 36, because no matter what you plan, it is always better if they are even numbered...