Overview: 3 questions will be solved this time.Among them
           ☆3 integer calculations

[1/3 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 8705×200
    Solution:
    8705×200 = 1741000
    Column vertical calculation:

								8	7	0	5
✖									2	0	0
								0	0	0	0
							0	0	0	0
					1	7	4	1	0
					1	7	4	1	0	0	0

[2/3 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 80760×30
    Solution:
    80760×30 = 2422800
    Column vertical calculation:

							8	0	7	6	0
✖										3	0
							0	0	0	0	0
					2	4	2	2	8	0
					2	4	2	2	8	0	0

[3/3 Integer column vertical calculation]
    Question type: Integer division
    Original question: 64800÷8100
    Solution:
    64800÷8100 = 8
    Column vertical calculation:

									8
8	1	0	0	丿	6	4	8	0	0
					6	4	8	0	0
									0

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