sao lai vay nhi minh tinh di tinh lai dau co nhieu the
2600*2+2000+800*5+500*5 = 13700
Lam gi co chuyen nhieu the nhi
___________________________
sao lai vay nhi minh tinh di tinh lai dau co nhieu the
2600*2+2000+800*5+500*5 = 13700
Lam gi co chuyen nhieu the nhi
Giai thick thu coi...