(8 / 9 + 1 and 3 / 7 + 6 / 11) / (3 / 11 + 5 / 7 + 4 / 9) simple calculation

【（8*77+10*99+6*81）/9*7*11】÷【（4*77+3*81+5*99）/9*7*11】
=（8*77+10*99+6*81）/（4*77+3*81+5*99）
=2

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