prompt: In four years, Suzy will be twice Mary's age then. If Suzy is 20 now, how old is Mary?
messages.content: In four years, Suzy will be twice Mary's age then. If Suzy is 20 now, how old is Mary?
messages.role: user
messages.content: In four years, Suzy will be 20+4=<<20+4=24>>24.
  Then Mary will be 24/2=<<24/2=12>>12.
  Then Mary is now 12-4=<<12-4=8>>8.
  #### 8
messages.role: assistant