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곱셈: 2 x 21X0

1

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

2

		3	8
		2	2
		7	6
	7	6	0
	8	3	6

3

		4	4
		4	1
		4	4
1	7	6	0
1	8	0	4

4

		7	2
		6	0
			0
4	3	2	0
4	3	2	0

5

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

6

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

7

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

8

		9	5
		6	5
	4	7	5
5	7	0	0
6	1	7	5

9

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

10

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

11

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

12

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

13

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

14

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

15

		2	5
		3	0
			0
	7	5	0
	7	5	0

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