human
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?
assistant
How many dolls does Ivy have? ** Ivy has 20/2*3=<<20/2*3=30>>30 dolls.
How many dolls does Dina have? ** Dina has 30*2=<<30*2=60>>60 dolls.
#### 60