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곱셈: 2 x 21X9

1

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

2

		8	6
		4	0
			0
3	4	4	0
3	4	4	0

3

		5	4
		5	0
			0
2	7	0	0
2	7	0	0

4

		1	3
		7	7
		9	1
	9	1	0
1	0	0	1

5

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

6

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

7

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

8

		3	9
		4	1
		3	9
1	5	6	0
1	5	9	9

9

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

10

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

11

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

12

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

13

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

14

		1	0
		2	1
		1	0
	2	0	0
	2	1	0

15

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

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