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

### Instruction:
 莎拉收集贝壳。她在度假前有20个贝壳。在度假期间，她每天找到5个贝壳，连续3天。然后第四天她找到了6个贝壳。她现在有多少个贝壳？


### Response:
 莎拉在3天内收集了5 x 3 = <<5*3=15>>15个贝壳。
所以，她从度假中收集了15 + 6 = <<15+6=21>>21个贝壳。
因此，她现在总共有20 + 21 = <<20+21=41>>41个贝壳。