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곱셈: 2 x 21X4

1

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

2

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

3

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

4

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

5

		2	0
		2	9
	1	8	0
	4	0	0
	5	8	0

6

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

7

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

8

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

9

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

10

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

11

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

12

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

13

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

14

		9	1
		3	3
	2	7	3
2	7	3	0
3	0	0	3

15

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

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