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곱셈: 2 x 21X0

1

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

2

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

3

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

4

		6	0
		6	5
	3	0	0
3	6	0	0
3	9	0	0

5

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

6

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

7

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

8

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

9

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

10

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

11

		5	6
		1	8
	4	4	8
	5	6	0
1	0	0	8

12

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

13

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

14

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

15

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

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