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곱셈: 2 x 21X0

1

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

2

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

3

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

4

		4	5
		2	0
			0
	9	0	0
	9	0	0

5

		5	6
		4	6
	3	3	6
2	2	4	0
2	5	7	6

6

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

7

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

8

		1	0
		5	1
		1	0
	5	0	0
	5	1	0

9

		4	4
		4	1
		4	4
1	7	6	0
1	8	0	4

10

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

11

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

12

		7	5
		2	9
	6	7	5
1	5	0	0
2	1	7	5

13

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

14

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

15

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

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