Explanation:
there are a many 0s as the exponent of 10 indicates.
10¹ = 10
10² = 100
10³ = 1000
10⁴ = 10,000
10⁵ = 100,000
...
whatever we have at the beginning, a multiplication by a power of 10 means we add as many 0s as that exponent indicates.
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