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곱셈: 2 x 21X0

1

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

2

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

3

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

4

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

5

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

6

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

7

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

8

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

9

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

10

		4	7
		1	3
	1	4	1
	4	7	0
	6	1	1

11

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

12

		7	0
		2	0
			0
1	4	0	0
1	4	0	0

13

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

14

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

15

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

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