prompt: Mel is three years younger than Katherine.  When Katherine is two dozen years old, how old will Mel be in years?
messages.content: Mel is three years younger than Katherine.  When Katherine is two dozen years old, how old will Mel be in years?
messages.role: user
messages.content: When Katherine is 2 dozen years old, she will be 2*12=<<2*12=24>>24 years old.
  If Mel is three years younger than Katherine, then when Katherine is 24 years old, Mel will be 24-3=<<24-3=21>>21 years old.
  #### 21
messages.role: assistant