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곱셈: 2 x 21X4

1

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

2

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

3

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

4

		4	4
		5	5
	2	2	0
2	2	0	0
2	4	2	0

5

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

6

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

7

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

8

		4	0
		4	9
	3	6	0
1	6	0	0
1	9	6	0

9

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

10

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

11

		3	8
		2	2
		7	6
	7	6	0
	8	3	6

12

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

13

		4	5
		2	9
	4	0	5
	9	0	0
1	3	0	5

14

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

15

		1	0
		6	7
		7	0
	6	0	0
	6	7	0

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