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

### Instruction:
 公园里有350棵树，其中70%是松树。不是松树的有多少棵？


### Response:
 由于70%的树是松树，有0.7*350 = <<0.7*350=245>>245棵松树。
因此，不是松树的数量是350-245 = <<350-245=105>>105棵。