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곱셈: 2 x 21X5

1

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

2

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

3

		5	2
		3	8
	4	1	6
1	5	6	0
1	9	7	6

4

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

5

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

6

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

7

		3	0
		2	3
		9	0
	6	0	0
	6	9	0

8

		9	6
		3	8
	7	6	8
2	8	8	0
3	6	4	8

9

		4	1
		4	6
	2	4	6
1	6	4	0
1	8	8	6

10

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

11

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

12

		8	7
		1	2
	1	7	4
	8	7	0
1	0	4	4

13

		1	5
		5	8
	1	2	0
	7	5	0
	8	7	0

14

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

15

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

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