X (c)(d)。 (5)

-

Article 7 (f)(g)

0 0 0

(h)㈠(j)(k)

-

Article 3, paragraph 1 (male)

c，e≠0，d=0。 Needless to say, f=7, h=3, k = 0；; g=n，i=l，j = m；

Namely:

(1). (b) 5

X (c) 0。 (5)

-

7 7 (North)

0 0 0

3( 1)(m)0

-

Article 3, paragraph 1 (male)

Because k=0, c is an even number, that is, 2468, 2 does not include (2x999

Let e= 1, then a=7, b=7, c=4, l= 1, m=0, n = 5；; Brought:

7 .7 5

X 4 0。 1

-

7 7 5

0 0 0

3 1 0 0

-

3 1 0 .7 7 5

Let e=2, then a=3, b=8, c=8, l=0, m=8, n = 0；; Brought:

3 .8 5

X 8 0。 2

-

7 7 0

0 0 0

3 0 8 0

-

3 0 8 .7 7 0

No careful calculation, no test.