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곱셈: 2 x 21X9

1

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

2

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

3

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

4

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

5

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

6

		5	0
		3	5
	2	5	0
1	5	0	0
1	7	5	0

7

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

8

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

9

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

10

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

11

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

12

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

13

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

14

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

15

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

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