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곱셈: 2 x 21X0

1

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

2

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

3

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

4

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

5

		3	8
		1	3
	1	1	4
	3	8	0
	4	9	4

6

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

7

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

8

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

9

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

10

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

11

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

12

		6	1
		3	1
		6	1
1	8	3	0
1	8	9	1

13

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

14

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

15

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

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