Give the step-by-step reasoning process and then the final answer. Angie bought three times as many pretzels at the mall as Shelly did. Shelly bought half as many pretzels as Barry. If Barry bought 12 pretzels, how many did Angie buy?
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Shelly bought 12 / 2 = 6 pretzels. Angie bought 6 * 3 = 18 pretzels.
The final answer: 18.
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