997×998= ___

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Question

997 \times 998 =

___

Answer:
:

997 \times 998 = (1000 - 3) (1000 - 2)

= 1000^{2} - 3 \times 1000 - 2 \times 1000 + (- 3) (- 2)

= [1000000 - 5000 + 6] = 995006

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