3. There is a four-digit number. Dividing it

in the middle into two parts, we get the front and back two $\uparrow=$ digit numbers. By adding a 0 to the end of the front two-digit number, and then adding the product of the front and back two-digit numbers, we get exactly the original four-digit number. It is also known that the unit digit of the original number is 5. Therefore, this four-digit number is $ـ$. $\qquad$
3. 1995