jjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjj jjjjjjjjjjjjjjjjjjjjjjjjjjjjjj Có 30kg muối chia vào các túi, mỗi túi có 6kg muối. Hỏi tất cả có mấy túi muối?

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