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곱셈: 2 x 21X0

1

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

2

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

3

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

4

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

5

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

6

		9	1
		9	0
			0
8	1	9	0
8	1	9	0

7

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

8

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

9

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

10

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

11

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

12

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

13

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

14

		7	2
		1	7
	5	0	4
	7	2	0
1	2	2	4

15

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

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