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곱셈: 2 x 21X0

1

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

2

		9	9
		7	3
	2	9	7
6	9	3	0
7	2	2	7

3

		2	9
		3	2
		5	8
	8	7	0
	9	2	8

4

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

5

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

6

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

7

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

8

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

9

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

10

		3	4
		1	5
	1	7	0
	3	4	0
	5	1	0

11

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

12

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

13

		7	0
		5	1
		7	0
3	5	0	0
3	5	7	0

14

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

15

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

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