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곱셈: 2 x 21X9

1

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

2

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

3

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

4

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

5

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

6

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

7

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

8

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

9

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

10

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

11

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

12

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

13

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

14

		3	9
		5	0
			0
1	9	5	0
1	9	5	0

15

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

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