∀ {X : Type u_1} {R : Type u_2} [inst : Zero X] [inst_1 : TopologicalSpace X] [inst_2 : TopologicalSpace R]
  [inst_3 : AddCommMonoid R] [inst_4 : ContinuousAdd R] {M : Type u_3} [inst_5 : Semiring M] [inst_6 : Module M R]
  [inst_7 : ContinuousConstSMul M R] (x y : M) (b : ContinuousMapZero X R), (x * y) • b = x • y • b