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곱셈: 2 x 21X4

1

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

2

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

3

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

4

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

5

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

6

		2	1
		5	2
		4	2
1	0	5	0
1	0	9	2

7

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

8

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

9

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

10

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

11

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

12

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

13

		1	5
		6	0
			0
	9	0	0
	9	0	0

14

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

15

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

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