mp_units::quantity::operator/=

template</* implementation-defined */ Q2>
requires detail::ScalarValuePreservingTo<typename Q2::rep, rep> && requires(rep& a, const Q2::rep b) {
      { a /= b } ‐> std::same_as<rep&>;
    }
constexpr
quantity&
operator/=(Q2 const& rhs) &;

template</* implementation-defined */ Value>
requires requires(rep& a, const Value b) {
      { a /= b } ‐> std::same_as<rep&>;
    }
constexpr
quantity&
operator/=(Value const& val) &;