∀ {G : Type u_1} [inst : MeasurableSpace G] [inst_1 : Group G] [MeasurableMul₂ G] (μ ν : MeasureTheory.Measure G)
  [MeasureTheory.SFinite ν] [MeasureTheory.SFinite μ] [MeasurableInv G] [μ.IsMulRightInvariant],
  MeasureTheory.MeasurePreserving (fun z => (z.2, z.1 / z.2)) (μ.prod ν) (ν.prod μ)