∀ {𝕜 : Type u} {ι : Type v} {E : ι → Type wE} {G : Type wG} {G' : Type wG'} [inst : NontriviallyNormedField 𝕜]
  [inst_1 : (i : ι) → SeminormedAddCommGroup (E i)] [inst_2 : (i : ι) → NormedSpace 𝕜 (E i)]
  [inst_3 : SeminormedAddCommGroup G] [inst_4 : NormedSpace 𝕜 G] [inst_5 : SeminormedAddCommGroup G']
  [inst_6 : NormedSpace 𝕜 G'] [inst_7 : Fintype ι] (f : ContinuousMultilinearMap 𝕜 E G)
  (g : ContinuousMultilinearMap 𝕜 E G'), ‖f.prod g‖ = max ‖f‖ ‖g‖