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

### Instruction:
 约翰每4天买1/2加仑的冷泡咖啡。他每天喝多少杯咖啡？


### Response:
 128/2 = <<128/2=64>>64盎司的咖啡每4天。
64/4 = <<64/4=16>>16盎司的咖啡每天。
16 = <<16=16>>16盎司。
所以他每天喝16/8 = <<16/8=2>>2杯咖啡。