Ivy has 20/2*3=<<20/2*3=30>>30 dolls.

Dina has 30*2=<<30*2=60>>60 dolls.

# Answer

60
<|im_start|>system
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<|im_start|>user
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?
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<|im_start|>assistant

user
60
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?
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