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곱셈: 2 x 21X2

1

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

2

		4	9
		6	0
			0
2	9	4	0
2	9	4	0

3

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

4

		1	7
		2	6
	1	0	2
	3	4	0
	4	4	2

5

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

6

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

7

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

8

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

9

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

10

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

11

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

12

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

13

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

14

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

15

		1	2
		4	0
			0
	4	8	0
	4	8	0

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