58 * 3 / 7 + 12 / 2 and 1 / 3

58 * 3 / 7 + 12 △ 2 and 1 / 3
=58 × 3 / 7 + 12 × 3 / 7
=(58 + 12) × 3 / 7
=70 × 3 / 7
=30

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