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곱셈: 2 x 21X0

1

		1	0
		4	4
		4	0
	4	0	0
	4	4	0

2

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

3

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

4

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

5

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

6

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

7

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

8

		1	5
		4	0
			0
	6	0	0
	6	0	0

9

		2	8
		1	4
	1	1	2
	2	8	0
	3	9	2

10

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

11

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

12

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

13

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

14

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

15

		4	7
		1	0
			0
	4	7	0
	4	7	0

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