Xiao Ming mistakenly multiplied a number by 6 and divided it by 6. Then he wanted to add 19, but he subtracted 19. After such a mistake, the number would be 36. Assuming Xiao Ming didn't make any mistakes, what would be the correct number?

(36 + 19) × 6 = 55 × 6 = 330; 330 × 6 + 19 = 1980 + 9 = 1999; a: the correct number should be 1999

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