conversations.from: human
conversations.value: Solve the following math problem: Chuck breeds dogs.  He has 3 pregnant dogs.  They each give birth to 4 puppies.  Each puppy needs 2 shots and each shot costs $5.  How much did the shots cost?
conversations.from: assistant
conversations.value: He has 3*4=12 puppies
  So they need 12*2=24 shots
  That means the vaccines cost 24*5=$120