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곱셈: 2 x 21X4

1

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

2

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

3

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

4

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

5

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

6

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

7

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

8

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

9

		1	1
		3	0
			0
	3	3	0
	3	3	0

10

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

11

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

12

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

13

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

14

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

15

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

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