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곱셈: 2 x 21X0

1

		1	0
		1	4
		4	0
	1	0	0
	1	4	0

2

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

3

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

4

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

5

		9	6
		7	1
		9	6
6	7	2	0
6	8	1	6

6

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

7

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

8

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

9

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

10

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

11

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

12

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

13

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

14

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

15

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

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