co hai so thap phan [moi so co ba chu so o phan nguyen ,mot chu so o phan thap phan] ma hieu la 326,2vi ngu gat nen sai 3 loi trong bai toan tru thanh cong bo dau phay cua phan thap phan va tang so hang tram o tren len 1 don vi nen co ket qua la 9192 tim hai so do