According to the Hanafi school, the estimation of travel distance is based on walking during the shortest days of the year from dawn until noon for three days, as mentioned in Al-Lubab. If we want to calculate that, the shortest day of the year is December 21, and the duration from dawn to noon on this day is six and a half hours. If we multiply that by three, it totals nineteen and a half hours. A person can typically walk at an average pace of about five and a half kilometers, which amounts to 107.305 kilometers based on the mentioned hours. However, you estimated it at eighty kilometers, how is that? I hope for a detailed response.