The formula with 160 substituted
miles = 160 ÷ 1.609344 = 99.419
The constant is an exact definition, not a rounded factor: the mile is 1.609344 km, the US gallon is 3.785411784 litres and the imperial gallon is 4.54609 litres. The Kilometres to Miles Converter explains where each comes from and gives a longer table.
At a walking pace of 5 km/h, 160 km takes about 1920 minutes. At an easy running pace of 10 km/h it takes about 960. In metres it is 160,000.
What 160 kilometres means in practice
160 km is a hundred miles, or just under: a hundred miles is 160.93 km. It is the distance of the flagship ultramarathon events and about the range a mid-size electric car adds in twenty minutes of fast charging.