fact: Definition nat_mult_perm102 : ∏ n0 n1 n2, n0 * n1 * n2 = n1 * n0 * n2 := λ n0 n1 n2, maponpaths (λ z, z * n2) (natmultcomm n0 n1).
imports: UniMath.Foundations.NaturalNumbers UniMath.Tactics.Utilities UniMath.Tactics.Abmonoids_Tactics