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곱셈: 2 x 21X5

1

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

2

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

3

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

4

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

5

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

6

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

7

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

8

		1	0
		5	0
			0
	5	0	0
	5	0	0

9

		4	1
		3	1
		4	1
1	2	3	0
1	2	7	1

10

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

11

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

12

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

13

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

14

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

15

		6	5
		6	0
			0
3	9	0	0
3	9	0	0

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