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곱셈: 2 x 21X0

1

		1	0
		9	1
		1	0
	9	0	0
	9	1	0

2

		9	1
		2	2
	1	8	2
1	8	2	0
2	0	0	2

3

		2	6
		3	2
		5	2
	7	8	0
	8	3	2

4

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

5

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

6

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

7

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

8

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

9

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

10

		4	1
		2	2
		8	2
	8	2	0
	9	0	2

11

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

12

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

13

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

14

		3	4
		5	0
			0
1	7	0	0
1	7	0	0

15

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

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