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곱셈: 2 x 21X5

1

		1	5
		5	3
		4	5
	7	5	0
	7	9	5

2

		3	3
		9	7
	2	3	1
2	9	7	0
3	2	0	1

3

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

4

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

5

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

6

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

7

		4	5
		2	2
		9	0
	9	0	0
	9	9	0

8

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

9

		3	0
		1	0
			0
	3	0	0
	3	0	0

10

		3	3
		4	4
	1	3	2
1	3	2	0
1	4	5	2

11

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

12

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

13

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

14

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

15

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

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