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

### Instruction:
 贝蒂有每2个蓝色珠子就有3个红色珠子。如果她有30个红色珠子，她有多少个蓝色珠子？


### Response:
 贝蒂有30/3 = 10组3个红色珠子。
所以，她有10 x 2 = <<10*2=20>>20个蓝色珠子。