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곱셈: 2 x 23X5

1

		3	5
		2	2
		7	0
	7	0	0
	7	7	0

2

		6	8
		3	8
	5	4	4
2	0	4	0
2	5	8	4

3

		4	4
		6	1
		4	4
2	6	4	0
2	6	8	4

4

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

5

		7	5
		3	9
	6	7	5
2	2	5	0
2	9	2	5

6

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

7

		4	3
		9	1
		4	3
3	8	7	0
3	9	1	3

8

		9	1
		9	6
	5	4	6
8	1	9	0
8	7	3	6

9

		1	9
		4	3
		5	7
	7	6	0
	8	1	7

10

		6	6
		2	0
			0
1	3	2	0
1	3	2	0

11

		1	4
		5	7
		9	8
	7	0	0
	7	9	8

12

		7	1
		5	0
			0
3	5	5	0
3	5	5	0

13

		3	5
		1	6
	2	1	0
	3	5	0
	5	6	0

14

		2	3
		4	0
			0
	9	2	0
	9	2	0

15

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

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