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곱셈: 2 x 21X4

1

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

2

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

3

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

4

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

5

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

6

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

7

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

8

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

9

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

10

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

11

		7	5
		7	6
	4	5	0
5	2	5	0
5	7	0	0

12

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

13

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

14

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

15

		3	0
		9	2
		6	0
2	7	0	0
2	7	6	0

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