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곱셈: 2 x 21X9

1

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

2

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

3

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

4

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

5

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

6

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

7

		9	0
		1	2
	1	8	0
	9	0	0
1	0	8	0

8

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

9

		4	6
		1	4
	1	8	4
	4	6	0
	6	4	4

10

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

11

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

12

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

13

		1	1
		6	9
		9	9
	6	6	0
	7	5	9

14

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

15

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

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