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곱셈: 2 x 21X5

1

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

2

		6	0
		1	3
	1	8	0
	6	0	0
	7	8	0

3

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

4

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

5

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

6

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

7

		8	0
		2	2
	1	6	0
1	6	0	0
1	7	6	0

8

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

9

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

10

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

11

		5	0
		9	5
	2	5	0
4	5	0	0
4	7	5	0

12

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

13

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

14

		5	2
		4	9
	4	6	8
2	0	8	0
2	5	4	8

15

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

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