You can bet that this creep will quickly learn math if he is shorted in his undeserved paycheck.
As long as the person being affected is somebody else, school teachers, administrators, and politicians are perfectly fine with going along with this nonsense. The only way to stop it is a stiff jolt of reality.
Here is a short parody video on alternative math that may point to the path of dealing with these persons and their enablers:
https://m.youtube.com/watch?v=Zh3Yz3PiXZw