Assume a fraction k/m, with 0≤k≤m and look at its digits written out
- The fraction has a finite number of digits (less m) OR is a repeated sequence with at the most m-1 digits per group
- A repeated sequence will have at the most n-1 zeroes next to each other, if the number is below 10ⁿ
- Interesting digit-structure of the sequence times m, with many 9’s (base minus 1) .
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