John raises emu.  He has 4 pens for emu and each pen has 6 emus in it.  Each female emu lays 1 egg per day.  If half the emu are females how many eggs does he get a week?
There are 6*4=<T>multiply(6, 4)=24 emus
So there are 24/2=<T>divide(24, 2)=12.0 female emus
So he gets 12*7=<T>multiply(12, 7)=84 eggs a week
