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곱셈: 2 x 21X4

1

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

2

		3	0
		2	2
		6	0
	6	0	0
	6	6	0

3

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

4

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

5

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

6

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

7

		4	2
		1	0
			0
	4	2	0
	4	2	0

8

		4	3
		1	1
		4	3
	4	3	0
	4	7	3

9

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

10

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

11

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

12

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

13

		5	5
		6	7
	3	8	5
3	3	0	0
3	6	8	5

14

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

15

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

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