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곱셈: 2 x 21X7

1

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

2

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

3

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

4

		3	4
		3	3
	1	0	2
1	0	2	0
1	1	2	2

5

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

6

		1	3
		4	6
		7	8
	5	2	0
	5	9	8

7

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

8

		1	9
		6	1
		1	9
1	1	4	0
1	1	5	9

9

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

10

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

11

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

12

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

13

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

14

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

15

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

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