Sandy's goal is to drink 3 liters of water in a day. She drinks 500 milliliters of water every after 2 hours. After how many hours will she be able to drink a total of 3 liters of water? Let's think first. Chain of thought:
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Since there are 1000 milliliters in 1 liter, then 3 liters is equal to 3 x 1000 = 3000 milliliters. She needs to drink 3000 / 500 = 6 sets of 500 milliliters of water. So, she will be able to drink a total of 3 liters after 6 sets x every 2 hours = 12 hours.
Therefore, the answer is 12.
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