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곱셈: 2 x 21X7

1

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

2

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

3

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

4

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

5

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

6

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

7

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

8

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

9

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

10

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

11

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

12

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

13

		1	6
		6	3
		4	8
	9	6	0
1	0	0	8

14

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

15

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

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