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

### Instruction:
 南希买了一个派，把它切成了8块。她给了乔和达西各1/2，给了卡尔1/4。还剩下多少块？


### Response:
 她给了乔和达西的总块数是1/2 x 8 = <<1/2*8=4>>4块。
她给了卡尔的总块数是1/4 x 8 = <<1/4*8=2>>2块。
所以，剩下的总块数是8 - 4 - 2 = <<8-4-2=2>>2块。