If log1087.5 = 4.9421, then the number of digits in (875)10 is

If log1087.5 = 4.9421, then the number of digits in (875)10 is?

This problem repeats another one in the library (at most with different numbers), so it's left out of browsing.

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AQuA-RAT — Algebra Question Answering with Rationales (Ling et al., DeepMind, 2017) · train #9918

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