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곱셈: 2 x 21X7

1

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

2

		3	9
		3	1
		3	9
1	1	7	0
1	2	0	9

3

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

4

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

5

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

6

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

7

		4	8
		5	6
	2	8	8
2	4	0	0
2	6	8	8

8

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

9

		3	3
		9	1
		3	3
2	9	7	0
3	0	0	3

10

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

11

		3	0
		3	3
		9	0
	9	0	0
	9	9	0

12

		3	3
		3	1
		3	3
	9	9	0
1	0	2	3

13

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

14

		3	7
		7	6
	2	2	2
2	5	9	0
2	8	1	2

15

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

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