Overview: 7 questions will be solved this time.Among them
           ☆7 integer calculations

[1/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 2100×600
    Solution:
    2100×600 = 1260000
    Column vertical calculation:

								2	1	0	0
✖									6	0	0
								0	0	0	0
							0	0	0	0
					1	2	6	0	0
					1	2	6	0	0	0	0

[2/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 4321×30
    Solution:
    4321×30 = 129630
    Column vertical calculation:

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

[3/7 Integer column vertical calculation]
    Question type: Integer division
    Original question: 5040÷630
    Solution:
    5040÷630 = 8
    Column vertical calculation:

							8
6	3	0	丿	5	0	4	0
				5	0	4	0
							0

[4/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 5900×300
    Solution:
    5900×300 = 1770000
    Column vertical calculation:

								5	9	0	0
✖									3	0	0
								0	0	0	0
							0	0	0	0
					1	7	7	0	0
					1	7	7	0	0	0	0

[5/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 7321×60
    Solution:
    7321×60 = 439260
    Column vertical calculation:

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

[6/7 Integer column vertical calculation]
    Question type: Integer division
    Original question: 1280÷320
    Solution:
    1280÷320 = 4
    Column vertical calculation:

							4
3	2	0	丿	1	2	8	0
				1	2	8	0
							0

[7/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 323×800
    Solution:
    323×800 = 258400
    Column vertical calculation:

								3	2	3
✖								8	0	0
								0	0	0
							0	0	0
					2	5	8	4
					2	5	8	4	0	0

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>>注：本次最多计算 7 道题。

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