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           ☆1 integer calculations

[1/1 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 415×4153
    Solution:
    415×4153 = 1723495
    Column vertical calculation:

									4	1	5
✖								4	1	5	3
								1	2	4	5
							2	0	7	5
							4	1	5
					1	6	6	0
					1	7	2	3	4	9	5

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