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곱셈: 2 x 21X4

1

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

2

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

3

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

4

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

5

		9	2
		1	0
			0
	9	2	0
	9	2	0

6

		3	1
		2	3
		9	3
	6	2	0
	7	1	3

7

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

8

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

9

		7	7
		8	0
			0
6	1	6	0
6	1	6	0

10

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

11

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

12

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

13

		2	1
		5	8
	1	6	8
1	0	5	0
1	2	1	8

14

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

15

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

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