John reels in 3 crab baskets a week.  Each basket holds 4 crabs.  He collects crabs twice a week.  Each crab sells for $3.  How much money does he make?
He collects 3*4=<T>multiply(3, 4)=12 crabs each time.
He thus collects 12*2=<T>multiply(12, 2)=24 crabs a week.
So he makes 24*3=$<T>multiply(24, 3)=72 a week.
