∀ (R : Type u_3) [inst : Monoid R] (A : Type u_1) (B : Type u_2) [inst_1 : NonUnitalNonAssocSemiring A]
  [inst_2 : DistribMulAction R A] [inst_3 : NonUnitalNonAssocSemiring B] [inst_4 : DistribMulAction R B] (x : R)
  (x_1 : A × B), (x • x_1).2 = (x • x_1).2