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곱셈: 2 x 21X7

1

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

2

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

3

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

4

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

5

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

6

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

7

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

8

		6	1
		1	6
	3	6	6
	6	1	0
	9	7	6

9

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

10

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

11

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

12

		1	1
		1	7
		7	7
	1	1	0
	1	8	7

13

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

14

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

15

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

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