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곱셈: 2 x 21X5

1

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

2

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

3

		1	3
		7	7
		9	1
	9	1	0
1	0	0	1

4

		2	1
		1	1
		2	1
	2	1	0
	2	3	1

5

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

6

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

7

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

8

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

9

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

10

		5	5
		6	6
	3	3	0
3	3	0	0
3	6	3	0

11

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

12

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

13

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

14

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

15

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

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