The rules that use the vocabulary item "set scale to" are:

<scale_operation-gapsout_null-gapsin_np_gap>

set scale to

<scale_operation-gapsout_null-gapsin_null>

set scale to <scale_number-gapsout_null-gapsin_null>

set scale to one over <scale_number-gapsout_null-gapsin_null>

set scale to one to <scale_number-gapsout_null-gapsin_null>