This lesson is on converting miles (mi) and kilometers (km). 1 km = 0.609 mile (3 decimals). Thus 1 mile = 1 / 0.609 which equals 1.64 km. Dividing 1 by 0.609 equals 1.64 km.
1 km = 0.609 mi.
1 mi = 1.64 km.