question: John cuts down an 80-foot tree.  He can make logs out of 80% of it. He cuts it into 4-foot logs.  From each of those logs, he cuts 5 planks.  He then sells each plank for $1.2.  How much does he make?
answer: He can use 80*.8=<<80*.8=64>>64 feet of the tree.
  That means he can make 64/4=<<64/4=16>>16 logs.
  That gives him16*5=<<16*5=80>>80 planks.
  So he makes 80*1.2=$<<80*1.2=96>>96.
  #### 96