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곱셈: 2 x 21X4

1

		1	4
		9	3
		4	2
1	2	6	0
1	3	0	2

2

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

3

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

4

		4	5
		6	2
		9	0
2	7	0	0
2	7	9	0

5

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

6

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

7

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

8

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

9

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

10

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

11

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

12

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

13

		1	1
		8	0
			0
	8	8	0
	8	8	0

14

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

15

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

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