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곱셈: 2 x 21X0

1

		1	0
		6	9
		9	0
	6	0	0
	6	9	0

2

		5	6
		1	1
		5	6
	5	6	0
	6	1	6

3

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

4

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

5

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

6

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

7

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

8

		2	1
		2	0
			0
	4	2	0
	4	2	0

9

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

10

		5	9
		4	9
	5	3	1
2	3	6	0
2	8	9	1

11

		8	3
		2	6
	4	9	8
1	6	6	0
2	1	5	8

12

		2	7
		8	5
	1	3	5
2	1	6	0
2	2	9	5

13

		2	1
		8	0
			0
1	6	8	0
1	6	8	0

14

		6	0
		3	2
	1	2	0
1	8	0	0
1	9	2	0

15

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

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