ATQ, 647.1 ÷ ? + 72.3 × 209.81 – 8743.1 = 6404 647 ÷ ? + 72 × 210 – 8743 ~ 6404 647 ÷ ? + 15120 – 8743 ~ 6404 647 ÷ ? ~ 27 ? ~ 24
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