conversations.from: human
conversations.value: Dina has twice as many dolls as Ivy. 2/3 of Ivy's dolls are collectors editions. If Ivy has 20 collectors edition dolls, how many dolls does Dina have?
  Solve this problem.
conversations.from: assistant
conversations.value: Ivy has 20/2*3=30 dolls.
  Dina has 30*2=60 dolls.