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곱셈: 2 x 21X9

1

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

2

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

3

		1	2
		1	0
			0
	1	2	0
	1	2	0

4

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

5

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

6

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

7

		6	6
		1	7
	4	6	2
	6	6	0
1	1	2	2

8

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

9

		1	7
		5	1
		1	7
	8	5	0
	8	6	7

10

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

11

		9	9
		1	1
		9	9
	9	9	0
1	0	8	9

12

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

13

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

14

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

15

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

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