АХ
template <typename M, typename L, typename T, typename A>
constexpr RQuantity<std::ratio_subtract<std::ratio<0>, M>, std::ratio_subtract<std::ratio<0>, L>, std::ratio_subtract<std::ratio<0>, T>, std::ratio_subtract<std::ratio<0>, A>>
operator/(double x, const RQuantity<M, L, T, A>& rhs)
{
return RQuantity<std::ratio_subtract<std::ratio<0>, M>, std::ratio_subtract<std::ratio<0>, L>, std::ratio_subtract<std::ratio<0>, T>, std::ratio_subtract<std::ratio<0>, A>>
(x / rhs.getValue());
}