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

### Instruction:
 吉姆有一个装满石头的桶。每块石头的平均重量是1.5磅。当地的石头收藏家同意以每磅4美元的价格购买他的石头。如果他从销售中赚了60美元，桶里有多少块石头？


### Response:
 桶里有15磅的石头，因为60 / 4 = <<60/4=15>>15
桶里有十块石头，因为15 / 1.5 = <<15/1.5=10>>10