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곱셈: 2 x 21X4

1

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

2

		1	0
		2	4
		4	0
	2	0	0
	2	4	0

3

		1	1
		5	0
			0
	5	5	0
	5	5	0

4

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

5

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

6

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

7

		8	5
		3	3
	2	5	5
2	5	5	0
2	8	0	5

8

		2	0
		2	1
		2	0
	4	0	0
	4	2	0

9

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

10

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

11

		3	6
		2	1
		3	6
	7	2	0
	7	5	6

12

		7	2
		6	0
			0
4	3	2	0
4	3	2	0

13

		6	0
		6	1
		6	0
3	6	0	0
3	6	6	0

14

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

15

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

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