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곱셈: 2 x 21X7

1

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

2

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

3

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

4

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

5

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

6

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

7

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

8

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

9

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

10

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

11

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

12

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

13

		7	8
		1	0
			0
	7	8	0
	7	8	0

14

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

15

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

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