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static VALUE
nucomp_mul(VALUE self, VALUE other)
{
    if (k_complex_p(other)) {
        VALUE real, imag;

        get_dat2(self, other);

        real = f_sub(f_mul(adat->real, bdat->real),
                     f_mul(adat->imag, bdat->imag));
        imag = f_add(f_mul(adat->real, bdat->imag),
                      f_mul(adat->imag, bdat->real));

        return f_complex_new2(CLASS_OF(self), real, imag);
    }
    if (k_numeric_p(other) && f_real_p(other)) {
        get_dat1(self);

        return f_complex_new2(CLASS_OF(self),
                              f_mul(dat->real, other),
                              f_mul(dat->imag, other));
    }
    return rb_num_coerce_bin(self, other, '*');
}
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