111...1×999...911111111...1(2008个1)×999999999...9(2008个9)=?要求清楚,快,

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111...1×999...911111111...1(2008个1)×999999999...9(2008个9)=?要求清楚,快,
111...1×999...9
11111111...1(2008个1)×999999999...9(2008个9)=?
要求清楚,快,

111...1×999...911111111...1(2008个1)×999999999...9(2008个9)=?要求清楚,快,
11111111...1(2008个1)×999999999...9(2008个9)
=11111111...1(2008个1)×(10000000...(2008个0)-1)
=1111111...100000...0(2008个1,2008个0)-11111111...1(2008个1)
=11111...1(2007个1)0888888.(2007个8)9