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곱셈: 2 x 21X3

1

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

2

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

3

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

4

		5	0
		9	4
	2	0	0
4	5	0	0
4	7	0	0

5

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

6

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

7

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

8

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

9

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

10

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

11

		1	8
		4	5
		9	0
	7	2	0
	8	1	0

12

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

13

		7	3
		6	5
	3	6	5
4	3	8	0
4	7	4	5

14

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

15

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

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