Overview: 1 questions will be solved this time.Among them
           ☆1 integer calculations

[1/% Digital analysis]
    Assignment: Convert 1/689 to decimal.
    Question type: Convert fraction to decimal
    Solution:
        1/689=0.001451378809869375907111756168359941944847605224963715529753265602322206095791
    *Note: Output 78 pure recurring decimals for this fraction,
        有78位（Underlined cyan font）circular section。

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