public function setQuota(): int
    {
        $this->quota = (int) floor(
            ($this->validBallots /
                ($this->election->getWinnersCount() + 1)
            ) // p. 47 (1)
            + 1); // p. 47 (2)

        $this->logger->info(sprintf('Quota set at %d based on %d winners and %d valid ballots', $this->quota, $this->election->getWinnersCount(), $this->validBallots));

        return $this->quota;
    }