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곱셈: 2 x 21X7

1

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

2

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

3

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

4

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

5

		2	1
		9	6
	1	2	6
1	8	9	0
2	0	1	6

6

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

7

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

8

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

9

		2	2
		3	2
		4	4
	6	6	0
	7	0	4

10

		6	1
		1	0
			0
	6	1	0
	6	1	0

11

		2	5
		7	7
	1	7	5
1	7	5	0
1	9	2	5

12

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

13

		7	5
		8	8
	6	0	0
6	0	0	0
6	6	0	0

14

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

15

		9	2
		6	0
			0
5	5	2	0
5	5	2	0

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