∀ {𝕜 : Type u_1} [inst : NontriviallyNormedField 𝕜] {n : WithTop ℕ∞} {H : Type u_2} [inst_1 : TopologicalSpace H]
  {E : Type u_3} [inst_2 : NormedAddCommGroup E] [inst_3 : NormedSpace 𝕜 E] {I : ModelWithCorners 𝕜 E H} {G : Type u_4}
  [inst_4 : TopologicalSpace G] [inst_5 : ChartedSpace H G] [inst_6 : GroupWithZero G] [ContMDiffInv₀ I n G]
  [ContMDiffMul I n G] {E' : Type u_5} [inst_9 : NormedAddCommGroup E'] [inst_10 : NormedSpace 𝕜 E'] {H' : Type u_6}
  [inst_11 : TopologicalSpace H'] {I' : ModelWithCorners 𝕜 E' H'} {M : Type u_7} [inst_12 : TopologicalSpace M]
  [inst_13 : ChartedSpace H' M] {f g : M → G} {a : M},
  ContMDiffAt I' I n f a → ContMDiffAt I' I n g a → g a ≠ 0 → ContMDiffAt I' I n (f / g) a