proposition: Lemma natq_div m n : n %| m -> (m %/ n)%:R = m%:R / n%:R :> rat.
proof: Proof. exact/char0_natf_div/char_num. Qed.
imports: HB(structures) mathcomp(ssreflect ssrfun ssrbool eqtype ssrnat seq choice) mathcomp(fintype bigop order ssralg countalg div ssrnum) mathcomp(ssrint prime archimedean)