ta goi so can tim la abc suy ra c=5 vi neu c=0 thi tich axbxc=0
ta co a= 1 vi abc la nho nhat
ta lai co :35:5=7
vay abc=175
goi so can tim la abc
vi abc la so nho nhat co 3 chu so nen a phai bang 1
vi tich cac chu so bang 35 nen c = 5 vi neu c=0 thi tich se bang 0
suy ra b=35:5=7
vay abc=175