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곱셈: 2 x 21X5

1

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

2

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

3

		6	5
		1	0
			0
	6	5	0
	6	5	0

4

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

5

		3	5
		3	4
	1	4	0
1	0	5	0
1	1	9	0

6

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

7

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

8

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

9

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

10

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

11

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

12

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

13

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

14

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

15

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

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