A jug is filled with 5 liters of water and a bucket is filled with 4 jugs. How many liters of water are contained in 2 buckets? Think carefully first, then make a decision:
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4 jugs contain 4 * 5 = 20 liters of water. 2 bucket contains 20 * 2 = 40 liters of water. So, the answer is 40.
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