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곱셈: 2 x 21X9

1

		1	9
		1	0
			0
	1	9	0
	1	9	0

2

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

3

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

4

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

5

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

6

		4	5
		2	0
			0
	9	0	0
	9	0	0

7

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

8

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

9

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

10

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

11

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

12

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

13

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

14

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

15

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

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