claim: Saw II sold fewer than 3 million units.
evidence: In mathematics , restriction of scalars -LRB- also known as `` Weil restriction '' -RRB- is a functor which , for any finite extension of fields L / k and any algebraic variety X over L , produces another variety ResL / kX , defined over k .. mathematics. mathematics. functor. functor. extension. field extension. algebraic variety. algebraic variety. It is useful for reducing questions about varieties over large fields to questions about more complicated varieties over smaller fields .