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곱셈: 2 x 21X4

1

		1	4
		2	2
		2	8
	2	8	0
	3	0	8

2

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

3

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

4

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

5

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

6

		5	5
		9	5
	2	7	5
4	9	5	0
5	2	2	5

7

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

8

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

9

		2	2
		3	8
	1	7	6
	6	6	0
	8	3	6

10

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

11

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

12

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

13

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

14

		8	7
		5	5
	4	3	5
4	3	5	0
4	7	8	5

15

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

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