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곱셈: 2 x 21X4

1

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

2

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

3

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

4

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

5

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

6

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

7

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

8

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

9

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

10

		1	5
		2	0
			0
	3	0	0
	3	0	0

11

		2	7
		2	6
	1	6	2
	5	4	0
	7	0	2

12

		9	4
		3	1
		9	4
2	8	2	0
2	9	1	4

13

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

14

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

15

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

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