99999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999+99999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999x99999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999=?
Ai đúng mình tick nhé
Giải làm sao đc?????
zậy sao giải em ?