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

### Instruction:
Audrey's key lime pie calls for 1/4 cup of key lime juice but she likes to double this amount to make it extra tart.  Each key lime yields 1 tablespoon of juice.  There are 16 tablespoons in 1 cup.  How many key limes does Audrey need?

### Response:
Her recipe calls for 1/4 cup of juice but she wants to use twice that amount so she needs 1/4 + 1/4 = 1/2 cup of lime juice
16 tablespoons are in 1 cup and she only needs 1/2 cup so she needs 16 * 1/2 = <<16*1/2=8>>8 tablespoons of juice
1 key lime yields 1 tablespoon of juice and she needs 8 tablespoons so she needs 1 * 8 = <<1*8=8>>8 key limes
#### 8