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곱셈: 2 x 21X5

1

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

2

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

3

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

4

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

5

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

6

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

7

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

8

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

9

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

10

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

11

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

12

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

13

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

14

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

15

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

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