99..9(88个)X99.9(88个)+199.9(88个)
=99..9(88个)X99.9(88个)+ 99.9(88个)+10^88
=99..9(88个)X [ 99.9(88个)+ 1 ] +10^88
=99..9(88个)X 10^88 + 10^88
=10^88 X [ 99.9(88个)+ 1 ]
=10^88 X10^88
=10^176
99..9(88个)X99.9(88个)+199.9(88个)
=99..9(88个)X99.9(88个)+ 99.9(88个)+10^88
=99..9(88个)X [ 99.9(88个)+ 1 ] +10^88
=99..9(88个)X 10^88 + 10^88
=10^88 X [ 99.9(88个)+ 1 ]
=10^88 X10^88
=10^176