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곱셈: 2 x 21X9

1

		1	9
		2	0
			0
	3	8	0
	3	8	0

2

		7	3
		9	5
	3	6	5
6	5	7	0
6	9	3	5

3

		5	8
		4	6
	3	4	8
2	3	2	0
2	6	6	8

4

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

5

		8	0
		4	5
	4	0	0
3	2	0	0
3	6	0	0

6

		4	1
		5	1
		4	1
2	0	5	0
2	0	9	1

7

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

8

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

9

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

10

		1	8
		1	2
		3	6
	1	8	0
	2	1	6

11

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

12

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

13

		1	4
		5	9
	1	2	6
	7	0	0
	8	2	6

14

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

15

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

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