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곱셈: 2 x 21X5

1

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

2

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

3

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

4

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

5

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

6

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

7

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

8

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

9

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

10

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

11

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

12

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

13

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

14

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

15

		6	5
		1	0
			0
	6	5	0
	6	5	0

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