7 / 8 * 23 =? Simple calculation

51 / 24 * 43 + 19 / 51 * 43 =?

24×51/43+51×19/43
=1/43×(24×51+51×19)
=1/43×[51×(24+19)]
=1/43×51×43
=51×1/43×43
=51

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