Samantha is making fruit salad for a party. Each fruit salad bowl requires 15 pieces of fruit. She plans to make 8 bowls of fruit salad. If she buys fruit in bags, with each bag containing 20 pieces of fruit, how many bags of fruit does Samantha need to buy to make all 8 bowls of fruit salad? Let's think step by step and output the final answer within \boxed{}.
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