800+300×90+9×770-6+677​

800 + 300 × 90 + 9 × 770 – 6 + 667 = ????

800 + 300 = 1100

1100 × 90 = 99.000

99.000 + 9 = 99.009

99.009 × 770 = 76.236.930

76.236.930 – 6 = 76.236.924

76.236.924 + 667 = 76.237.591

76.237.591 ✔✔

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