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곱셈: 2 x 21X7

1

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

2

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

3

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

4

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

5

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

6

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

7

		7	2
		1	0
			0
	7	2	0
	7	2	0

8

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

9

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

10

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

11

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

12

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

13

		4	4
		4	4
	1	7	6
1	7	6	0
1	9	3	6

14

		9	0
		2	5
	4	5	0
1	8	0	0
2	2	5	0

15

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

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