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곱셈: 2 x 21X4

1

		1	4
		5	5
		7	0
	7	0	0
	7	7	0

2

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

3

		7	9
		4	7
	5	5	3
3	1	6	0
3	7	1	3

4

		5	0
		6	1
		5	0
3	0	0	0
3	0	5	0

5

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

6

		1	5
		4	5
		7	5
	6	0	0
	6	7	5

7

		1	5
		1	2
		3	0
	1	5	0
	1	8	0

8

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

9

		9	3
		4	7
	6	5	1
3	7	2	0
4	3	7	1

10

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

11

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

12

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

13

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

14

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

15

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

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