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곱셈: 2 x 21X4

1

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

2

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

3

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

4

		8	4
		7	3
	2	5	2
5	8	8	0
6	1	3	2

5

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

6

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

7

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

8

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

9

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

10

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

11

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

12

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

13

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

14

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

15

		2	5
		8	5
	1	2	5
2	0	0	0
2	1	2	5

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