Function div_rem_limb_with_reciprocal 

pub(crate) const fn div_rem_limb_with_reciprocal<const L: usize>(
    u: &Uint<L>,
    reciprocal: &Reciprocal,
) -> (Uint<L>, Limb)

Divides u by the divisor encoded in the reciprocal, and returns the quotient and the remainder.