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곱셈: 2 x 21X5

1

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

2

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

3

		4	4
		4	3
	1	3	2
1	7	6	0
1	8	9	2

4

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

5

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

6

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

7

		1	5
		5	0
			0
	7	5	0
	7	5	0

8

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

9

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

10

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

11

		4	4
		8	4
	1	7	6
3	5	2	0
3	6	9	6

12

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

13

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

14

		4	5
		7	0
			0
3	1	5	0
3	1	5	0

15

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

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