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곱셈: 2 x 21X4

1

		1	4
		5	4
		5	6
	7	0	0
	7	5	6

2

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

3

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

4

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

5

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

6

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

7

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

8

		1	2
		1	5
		6	0
	1	2	0
	1	8	0

9

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

10

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

11

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

12

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

13

		5	0
		1	1
		5	0
	5	0	0
	5	5	0

14

		9	8
		4	0
			0
3	9	2	0
3	9	2	0

15

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

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