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

### Instruction:
 拉拉在花店买了52支花茎。她给了妈妈15朵花，比给妈妈多给了她奶奶6朵花。她把剩下的放在花瓶里。拉拉把多少支花茎放在花瓶里？


### Response:
 拉拉给她奶奶的花的总数是15 + 6 = <<15+6=21>>21。
拉拉给出去的花茎总数是21 + 15 = <<21+15=36>>36。
拉拉放在花瓶里的花茎总数是52 - 36 = <<52-36=16>>16。