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곱셈: 2 x 21X0

1

		1	0
		8	5
		5	0
	8	0	0
	8	5	0

2

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

3

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

4

		7	5
		9	4
	3	0	0
6	7	5	0
7	0	5	0

5

		9	1
		1	0
			0
	9	1	0
	9	1	0

6

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

7

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

8

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

9

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

10

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

11

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

12

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

13

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

14

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

15

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

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