∀ (R : Type u_8) (M₁ : Type u_9) (M₂ : Type u_10) (M₃ : Type u_11) (M₄ : Type u_12) [inst : Semiring R]
  [inst_1 : AddCommMonoid M₁] [inst_2 : AddCommMonoid M₂] [inst_3 : AddCommMonoid M₃] [inst_4 : AddCommMonoid M₄]
  [inst_5 : Module R M₁] [inst_6 : Module R M₂] [inst_7 : Module R M₃] [inst_8 : Module R M₄]
  [inst_9 : TopologicalSpace M₁] [inst_10 : TopologicalSpace M₂] [inst_11 : TopologicalSpace M₃]
  [inst_12 : TopologicalSpace M₄],
  (ContinuousLinearEquiv.prodProdProdComm R M₁ M₂ M₃ M₄).toLinearEquiv = LinearEquiv.prodProdProdComm R M₁ M₂ M₃ M₄