99999999×99999999+199999999=99999999×99999999+99999999+10000000=99999999x(99999999+1)+10000000=99999999x100000000+10000000=9999999900000000+10000000=1000000000000000
99999999×99999999+199999999=99999999×99999999+99999999+10000000=99999999x(99999999+1)+10000000=99999999x100000000+10000000=9999999900000000+10000000=1000000000000000