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Xiaohong bought three kinds of flowers, and there happened to be three flowerpots at home. A flower is planted in each flowerpot. How many planting methods are there?
The first 3 times 3 get 9 3*3=9 kinds. All three kinds of flowers have the opportunity to choose any flowerpot, and each flowerpot also has the opportunity to choose three times. Every flower is equal.

The second is 3+2+ 1=6. Now, the answer to this question is controversial. Please give a more reasonable explanation to this problem. Thank you teachers.