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

### Instruction:
 迪亚哥为他姐姐的生日烤了12个蛋糕。唐纳德也烤了4个蛋糕，但在等待派对开始时吃了一个。还剩下多少个蛋糕？


### Response:
 总共烤的蛋糕数量是12 + 4 = <<12+4=16>>16个蛋糕。
但是由于迪亚哥吃了一个蛋糕，所以还剩下16 - 1 = 15个蛋糕。