prompt: Mark has 3 tanks for pregnant fish.  Each tank has 4 pregnant fish and each fish gives birth to 20 young.  How many young fish does he have at the end?
messages.content: Mark has 3 tanks for pregnant fish.  Each tank has 4 pregnant fish and each fish gives birth to 20 young.  How many young fish does he have at the end?
messages.role: user
messages.content: He has 4*3=<<4*3=12>>12 pregnant fish
  They give birth to 12*20=<<12*20=240>>240 fish
  #### 240
messages.role: assistant