Success of arithmetic between 2 fields sometimes depends on which field is on the LHS #16
Description
>>> f
<CF Field: long_name=SURFACE TILE FRACTIONS(time(136), long_name=pseudolevel(29), latitude(144), longitude(192))>
>>> g
<CF Field: long_name=FRACTION OF LAND(time(136), latitude(144), longitude(192))>
>>> f * g
<CF Field: long_name=SURFACE TILE FRACTIONS(time(136), long_name=pseudolevel(29), latitude(144), longitude(192))>
>>> g * f
ValueError: Can't set <CF DimensionCoordinate: long_name=pseudolevel(29) 1>: Data shape of (29,) does not match the shape required by domain axes (): ()