Mimi has 2 x 12 = <<2*12=24>>24 sea shells.

Kyle has 24 x 2 = <<24*2=48>>48 sea shells.

Leigh has 48 / 3 = <<48/3=16>>16 sea shells.

# Answer

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<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Mimi picked up 2 dozen seashells on the beach.  Kyle found twice as many shells as Mimi and put them in his pocket. Leigh grabbed one-third of the shells that Kyle found.  How many seashells did Leigh have?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
16
Mimi picked up 2 dozen seashells on the beach.  Kyle found twice as many shells as Mimi and put them in his pocket. Leigh grabbed one-third of the shells that Kyle found.  How many seashells did Leigh have?
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