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곱셈: 2 x 21X4

1

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

2

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

3

		3	0
		2	3
		9	0
	6	0	0
	6	9	0

4

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

5

		3	9
		5	0
			0
1	9	5	0
1	9	5	0

6

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

7

		1	4
		5	7
		9	8
	7	0	0
	7	9	8

8

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

9

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

10

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

11

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

12

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

13

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

14

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

15

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

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