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곱셈: 2 x 21X7

1

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

2

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

3

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

4

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

5

		1	7
		6	5
		8	5
1	0	2	0
1	1	0	5

6

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

7

		5	5
		8	0
			0
4	4	0	0
4	4	0	0

8

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

9

		5	2
		1	5
	2	6	0
	5	2	0
	7	8	0

10

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

11

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

12

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

13

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

14

		9	0
		9	9
	8	1	0
8	1	0	0
8	9	1	0

15

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

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