Tìm Một SỐ CÓ 9999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999 CHỮ SỐ BIẾT SỐ DÓ CHIA CHO 1 THÌ BẰNG CHÍNH SỐ ĐÓ
1-6-4 = -9 nhé
HT
-11( sai đừng giận mình nhe)