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곱셈: 2 x 21X4

1

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

2

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

3

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

4

		1	5
		3	0
			0
	4	5	0
	4	5	0

5

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

6

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

7

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

8

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

9

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

10

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

11

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

12

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

13

		9	5
		6	5
	4	7	5
5	7	0	0
6	1	7	5

14

		7	0
		1	4
	2	8	0
	7	0	0
	9	8	0

15

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

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