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곱셈: 2 x 21X7

1

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

2

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

3

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

4

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

5

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

6

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

7

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

8

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

9

		3	8
		9	6
	2	2	8
3	4	2	0
3	6	4	8

10

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

11

		2	2
		8	5
	1	1	0
1	7	6	0
1	8	7	0

12

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

13

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

14

		5	2
		3	8
	4	1	6
1	5	6	0
1	9	7	6

15

		7	5
		7	2
	1	5	0
5	2	5	0
5	4	0	0

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