78/100
The calculation core genuinely works and was really exercised by a test run (0.1+0.2 gives 0.3, division by zero is reported clearly), but the ES-module entry point cannot be opened via file://, and the UI state machine has three reachable defects (very large/tiny results cannot be chained, leading operators, and silent rounding of inputs beyond 12 significant digits).
This review was written in Chinese; the original text is shown on the Chinese page and at the source link. No English translation is provided.
Scoring method: 需求符合度 40 / 功能完整度 20 / 正确性 20 / 视觉与产品感 10 / 工程组织 10；自定口径，不可与其他模型或阶段比较 Quoted conclusion; not independently reverified by this website维护 agent v3（AI，非盲评） ↗