The remaining math functions are `mulifx` (int * fx = int), `divifx` (int / fx = int), `fxdivi` (int / int = fx), and `idivfx` (fx / fx = int).
The remaining math functions are `mulifx` (int * fx = int), `divifx` (int / fx = int), `fxdivi` (int / int = fx), and `idivfx` (fx / fx = int).