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곱셈: 2 x 21X5

1

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

2

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

3

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

4

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

5

		6	5
		5	6
	3	9	0
3	2	5	0
3	6	4	0

6

		1	1
		1	1
		1	1
	1	1	0
	1	2	1

7

		1	0
		3	0
			0
	3	0	0
	3	0	0

8

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

9

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

10

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

11

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

12

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

13

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

14

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

15

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

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