The screen design in the material master for the UOM conversion is subject to user data entry error. If the field were designed as follows:
QTY FROM UOM QTY TO UOM
1 FEET = 12 INCH
1 PIECE = 244 INCH
25.4 MM = 1 INCH
Changing the way data is entered would eliminate the user choosing whether to multiply/divide and the screen. This UOM conversion design is more intuitive to detect errors, would reduce users choosing the wrong operation, and provide enough information for Acumatica to do the math.