Overview: 4 questions will be solved this time.Among them
           ☆4 integer calculations

[1/4 Integer column vertical calculation]
    Question type: Integer division
    Original question: 854/42
    Solution:
    854/42 = 20 ··· ··· 14
    Column vertical calculation:

				2	0
4	2	丿	8	5	4
			8	4
				1	4
					0
				1	4

[2/4 Integer column vertical calculation]
    Question type: Integer division
    Original question: 804/42
    Solution:
    804/42 = 19 ··· ··· 6
    Column vertical calculation:

				1	9
4	2	丿	8	0	4
			4	2
			3	8	4
			3	7	8
					6

[3/4 Integer column vertical calculation]
    Question type: Integer division
    Original question: 260/43
    Solution:
    260/43 = 6 ··· ··· 2
    Column vertical calculation:

					6
4	3	丿	2	6	0
			2	5	8
					2

[4/4 Integer column vertical calculation]
    Question type: Integer division
    Original question: 260/44
    Solution:
    260/44 = 5 ··· ··· 40
    Column vertical calculation:

					5
4	4	丿	2	6	0
			2	2	0
				4	0

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