10001*999900009999000099990001_ Mathematical calculation

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           ☆1 integer calculations

[1/1 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 10001*999900009999000099990001
    Solution:
    10001*999900009999000099990001 = 10000000000000000000000000001
    Column vertical calculation:

																									1	0	0	0	1
✖						9	9	9	9	0	0	0	0	9	9	9	9	0	0	0	0	9	9	9	9	0	0	0	1

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																								0	0	0	0	0
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		9	0	0	0	9

	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	1

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✖						9	9	9	9	0	0	0	0	9	9	9	9	0	0	0	0	9	9	9	9	0	0	0	1

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		9	0	0	0	9

	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	1

																									1	0	0	0	1
✖						9	9	9	9	0	0	0	0	9	9	9	9	0	0	0	0	9	9	9	9	0	0	0	1

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		9	0	0	0	9

	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	1

																									1	0	0	0	1
✖						9	9	9	9	0	0	0	0	9	9	9	9	0	0	0	0	9	9	9	9	0	0	0	1

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					9	0	0	0	9
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			9	0	0	0	9
		9	0	0	0	9

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