My guess: 143547
The first two digits of the answer are formed by multiplying the first two digits of the problem.
The second two digits of the answer are formed by multiplying the first and last digits of the problem.
The last two digits of the answer are formed by adding the number represented by the first two digits of the answer to the number represented by the second two digits of the answer and subtracting the middle digit of the problem.
My guess: 143547
The first two digits of the answer are formed by multiplying the first two digits of the problem.
The second two digits of the answer are formed by multiplying the first and last digits of the problem.
The last two digits of the answer are formed by adding the number represented by the first two digits of the answer to the number represented by the second two digits of the answer and subtracting the middle digit of the problem.