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곱셈: 2 x 21X5

1

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

2

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

3

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

4

		3	1
		4	3
		9	3
1	2	4	0
1	3	3	3

5

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

6

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

7

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

8

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

9

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

10

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

11

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

12

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

13

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

14

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

15

		9	5
		9	0
			0
8	5	5	0
8	5	5	0

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