If I expand $25\cdot 24\cdot 23 \cdots 3 \cdot 2 \cdot 1$, how many zeros are there at the end of the number I get?
Question:
If I expand $25\cdot 24\cdot 23 \cdots 3 \cdot 2 \cdot 1$, how many zeros are there at the end of the number I get?
Answer:
Let's think step by step.

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6
If I expand $25\cdot 24\cdot 23 \cdots 3 \cdot 2 \cdot 1$, how many zeros are there at the end of the number I get?
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