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곱셈: 2 x 21X5

1

		1	5
		1	7
	1	0	5
	1	5	0
	2	5	5

2

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

3

		8	2
		6	8
	6	5	6
4	9	2	0
5	5	7	6

4

		4	4
		6	0
			0
2	6	4	0
2	6	4	0

5

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

6

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

7

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

8

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

9

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

10

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

11

		7	6
		2	9
	6	8	4
1	5	2	0
2	2	0	4

12

		1	5
		7	4
		6	0
1	0	5	0
1	1	1	0

13

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

14

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

15

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

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