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Calcrostic© of the Day
昨天的解法
28 / 4 = 7 + - × × × 21 / 7 = 3 = = = = = 49 - 28 = 21
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28 / 4 = 7 + - × × × 21 / 7 = 3 = = = = = 49 - 28 = 21
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