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곱셈: 2 x 21X4

1

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

2

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

3

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

4

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

5

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

6

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

7

		1	8
		8	5
		9	0
1	4	4	0
1	5	3	0

8

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

9

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

10

		4	0
		1	0
			0
	4	0	0
	4	0	0

11

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

12

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

13

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

14

		8	6
		2	3
	2	5	8
1	7	2	0
1	9	7	8

15

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

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