\documentclass[a4paper]{report}

\usepackage[francais]{babel}
\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}
\usepackage[cyr]{aeguill} %Guillemet français
\usepackage[12pt]{extsizes}
\usepackage[lmargin = 2cm, rmargin = 2cm, top= 2cm, bottom = 2cm]{geometry}
\usepackage{setspace}