How to calculate divination?

They are all wrong. When you divide by division, the remainder is not 8, but 0.

Plum blossoms are changeable. When the remainder is 0, take Kun Gua.

The 3 you said is not a remainder.

For example, if 25 is divided by 8, it should be an integer of 3, and the remainder is 1, so divination will be done.

24 divided by 8 should be an integer of 3, and the remainder is 0, so you can get Kungua.

Divination is based on remainder, not integer, understand?