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곱셈: 2 x 21X4

1

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

2

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

3

		7	3
		8	2
	1	4	6
5	8	4	0
5	9	8	6

4

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

5

		1	1
		3	5
		5	5
	3	3	0
	3	8	5

6

		1	9
		3	5
		9	5
	5	7	0
	6	6	5

7

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

8

		1	5
		3	5
		7	5
	4	5	0
	5	2	5

9

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

10

		9	2
		2	8
	7	3	6
1	8	4	0
2	5	7	6

11

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

12

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

13

		2	4
		3	1
		2	4
	7	2	0
	7	4	4

14

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

15

		1	0
		2	0
			0
	2	0	0
	2	0	0

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