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

### Instruction:
 25%的牡蛎里有珍珠。杰米每次潜水可以收集16个牡蛎。他需要潜多少次才能收集到56颗珍珠？


### Response:
 首先找出每次潜水的珍珠数量：16个牡蛎 * 25% 珍珠/牡蛎 = 4颗珍珠/次
然后将珍珠数量除以每次潜水的珍珠数量来找出潜水次数：56颗珍珠 / 4颗珍珠/次 = 14次潜水