有两种做法:
Number 1
1111...111(2002个)x[100...00(2002 个0)-1]
=1111....1111(2002个)x1000...0000(2002 个0)-1111....1111(2002个)
= 111...1111(2002个)00.....0000(2002个)-1111....1111(2002个)
= 111.....11111(2001个1)0888....8888(2001个8)9
Number 2
找规律:
99x11=1089
999x111=110889
9999x1111=11108889
.......
.........
...........
9999...9999(2002个)x1111....1111(2002个)
= 111.....11111(2001个1)0888....8888(2001个8)9
.