feat(data/real/ennreal): `mul_div_mul_left` (#18051)
Co-authored-by: Rémi Bottinelli <remi.bottinelli@alumni.epfl.ch>
Co-authored-by: Floris van Doorn <fpvdoorn@gmail.com>
Co-authored-by: Yaël Dillies <yael.dillies@gmail.com>
Co-authored-by: madvorak <dvorakmartinbridge@seznam.cz>
Co-authored-by: Yaël Dillies <yael.dillies@gmail.com>
