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곱셈: 2 x 21X7

1

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

2

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

3

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

4

		5	2
		5	5
	2	6	0
2	6	0	0
2	8	6	0

5

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

6

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

7

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

8

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

9

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

10

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

11

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

12

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

13

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

14

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

15

		5	3
		9	4
	2	1	2
4	7	7	0
4	9	8	2

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