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

### Instruction:
Christine and Rachel went strawberry picking.  They want to make pies and need 3 pounds of strawberries per pie.  Christine picked 10 pounds of strawberries and Rachel picked twice as much as Rachel.  Together, how many pies can they make?

### Response:
Christine picked 10 pounds and Rachel picked twice as much, so Rachel picked 10*2 = <<10*2=20>>20 pounds of strawberries
To make a pie you need 3 pounds of strawberries and Christine picked 10 pounds and Rachel picked 20 pounds, so together they have 10+20 = 30 pounds of strawberries
With 30 pounds of strawberries they can make 30/3 = <<30/3=10>>10 strawberry pies
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