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곱셈: 2 x 21X5

1

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

2

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

3

		9	7
		1	2
	1	9	4
	9	7	0
1	1	6	4

4

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

5

		9	6
		1	8
	7	6	8
	9	6	0
1	7	2	8

6

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

7

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

8

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

9

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

10

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

11

		4	4
		8	8
	3	5	2
3	5	2	0
3	8	7	2

12

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

13

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

14

		4	7
		4	2
		9	4
1	8	8	0
1	9	7	4

15

		9	8
		1	1
		9	8
	9	8	0
1	0	7	8

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