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곱셈: 2 x 21X4

1

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

2

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

3

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

4

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

5

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

6

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

7

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

8

		6	7
		6	0
			0
4	0	2	0
4	0	2	0

9

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

10

		1	0
		2	2
		2	0
	2	0	0
	2	2	0

11

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

12

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

13

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

14

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

15

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

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