Check a phone / plate / any number against the traditional 81-number fortune table.
数字各位反复相加，直至落在 1–81 区间，对照传统八十一数理判断吉凶。仅供娱乐。
Type any number (phone, license plate, ID tail…). Its digits are summed repeatedly until the result falls in 1–81, then matched to the traditional 81-number fortune table (数理) as 吉 / 凶 / 平 with a short meaning. The method mirrors the name-numberlore (五格剖象) tradition. For entertainment only — not real prediction.