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곱셈: 2 x 21X7

1

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

2

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

3

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

4

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

5

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

6

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

7

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

8

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

9

		5	7
		2	1
		5	7
1	1	4	0
1	1	9	7

10

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

11

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

12

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

13

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

14

		3	3
		1	1
		3	3
	3	3	0
	3	6	3

15

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

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