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곱셈: 2 x 21X9

1

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

2

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

3

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

4

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

5

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

6

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

7

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

8

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

9

		2	0
		4	4
		8	0
	8	0	0
	8	8	0

10

		1	0
		2	7
		7	0
	2	0	0
	2	7	0

11

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

12

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

13

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

14

		5	3
		3	3
	1	5	9
1	5	9	0
1	7	4	9

15

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

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