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곱셈: 2 x 21X4

1

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

2

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

3

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

4

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

5

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

6

		3	0
		3	3
		9	0
	9	0	0
	9	9	0

7

		3	7
		8	5
	1	8	5
2	9	6	0
3	1	4	5

8

		4	4
		5	7
	3	0	8
2	2	0	0
2	5	0	8

9

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

10

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

11

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

12

		9	6
		1	0
			0
	9	6	0
	9	6	0

13

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

14

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

15

		4	0
		7	5
	2	0	0
2	8	0	0
3	0	0	0

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