readable_wrong_result_type.cpp:10:41: error: conversion from ‘units::detail::rewrap_to_named_t<units::unit<units::area::square_meters_, double, units::linear_scale> >’ {aka ‘units::area::square_meters<double>’} to non-scalar type ‘units::length::meters<double>’ requested
   10 | units::length::meters<double> a = 1.0_m * 1.0_m; // ill-formed: m*m is an area, not a length
      |                                   ~~~~~~^~~~~~~