Mr. Jackson’s fourth-grade class has 27 students. He wants to give each student 2 glue sticks. The glue sticks come in packs of 8. How many packs will Mr. Jackson need to buy so every student can have 2 glue sticks, assuming he can only buy whole packs and he expects to have some extra glue sticks left over?
Please reason step by step, and put your final answer within \boxed{}.
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