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곱셈: 2 x 23X9

1

		3	9
		2	5
	1	9	5
	7	8	0
	9	7	5

2

		2	7
		2	3
		8	1
	5	4	0
	6	2	1

3

		2	3
		6	5
	1	1	5
1	3	8	0
1	4	9	5

4

		5	7
		1	0
			0
	5	7	0
	5	7	0

5

		8	2
		5	4
	3	2	8
4	1	0	0
4	4	2	8

6

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

7

		3	5
		5	2
		7	0
1	7	5	0
1	8	2	0

8

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

9

		6	1
		6	3
	1	8	3
3	6	6	0
3	8	4	3

10

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

11

		3	9
		2	0
			0
	7	8	0
	7	8	0

12

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

13

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

14

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

15

		3	0
		6	1
		3	0
1	8	0	0
1	8	3	0

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