Finding a safe password
We want to open the cow door, we don't know the safety password, but we have the following information:
The password is 4 digits
Division of the third digit by the first digit is 4
The last figure is the individual
The last digit of a unit of its first digit is smaller
The first digit of three units of the second digit is smaller
The division of the second digit on the first digit is 2.5
Given the above, what numbers can be? Write a program to find these numbers.