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

### Instruction:
 克里斯汀比唐多7张CD。如果唐有10张CD，他们一共有多少张CD？


### Response:
 克里斯汀有10 + 7 = <<10+7=17>>17张CD。
因此，他们一共有10 + 17 = <<10+17=27>>27张CD。