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곱셈: 2 x 21X7

1

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

2

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

3

		5	3
		6	0
			0
3	1	8	0
3	1	8	0

4

		1	0
		7	5
		5	0
	7	0	0
	7	5	0

5

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

6

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

7

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

8

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

9

		7	2
		8	7
	5	0	4
5	7	6	0
6	2	6	4

10

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

11

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

12

		9	4
		6	0
			0
5	6	4	0
5	6	4	0

13

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

14

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

15

		4	5
		6	6
	2	7	0
2	7	0	0
2	9	7	0

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