Below is an instruction that describes a task. Write a response that appropriately completes the request in Thai. Please answer in Thai.

### Instruction:
Dina has 60 dolls. She has twice as many dolls as Ivy. 2/3 of Ivy's dolls are collectors editions. How many collectors edition dolls does Ivy have?

### Response:
 ไอวี่มีตุ๊กตา 60 / 2 = <<60/2=30>>30 ตัว
ไอวี่มีตุ๊กตารุ่นสะสม 30 * (2/3) = <<30*(2/3)=20>>20 ตัว