∀ {ι : Type u_1} {X : ι → Type u_2} {mX : (i : ι) → MeasurableSpace (X i)} (μ : (i : ι) → MeasureTheory.Measure (X i))
  [hμ : ∀ (i : ι), MeasureTheory.IsProbabilityMeasure (μ i)] [inst : Fintype ι] {s : Set ((i : ι) → X i)},
  MeasurableSet s → (MeasureTheory.piContent μ) s = (MeasureTheory.Measure.pi μ) s