answer is: 65024

literally, done in my head that fast.

no smoke, no mirrors.

however, there was a "trick", two actually.

First, two numbers multipied together that differ by two will give a product
that is 1 less than the square of the number between them.

Second, a number squared that ends in 5 gives a product that ends in 25, and
the other digits are equal to the remaining digit(s) times itself plus one.

Got it?

jeffies wife will explain it if you ask her.