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725 * (9 + 1) =725 * 10 = 7250;
725 * 9 + 725 * 1 = 725 * (9 + 1) = 7250;
75 * (10 + 1) = 750+ 75 = 825;
(971 + 21 + 8) * 385 =1000 * 385 =385000;
(64 + 36) * 723 = 100 * 723 72300;
85 * (1000 + 100) = 85000 + 8500 = 93500.