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

### Instruction:
 卡莉有42个棒棒糖要和她的朋友分享。一半的棒棒糖是樱桃味，剩下的是相等数量的西瓜味、酸苹果味和葡萄味。有多少个棒棒糖是葡萄味的？


### Response:
 42个棒棒糖 / 2 = <<42/2=21>>21个不是樱桃味的。
21个棒棒糖 / 3 = <<21/3=7>>7个是葡萄味的。