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곱셈: 2 x 21X5

1

		1	5
		6	5
		7	5
	9	0	0
	9	7	5

2

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

3

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

4

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

5

		4	1
		5	1
		4	1
2	0	5	0
2	0	9	1

6

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

7

		2	0
		3	3
		6	0
	6	0	0
	6	6	0

8

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

9

		4	5
		2	1
		4	5
	9	0	0
	9	4	5

10

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

11

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

12

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

13

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

14

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

15

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

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