The quantity of 80 centimeters can be converted into feet by multiplying the quantity by .032808, which would equal 2.624 feet, or 2 feet 7 1/2 inches. Converting any quantity into centimeters can be done automatically using an online converter, many of which are available fro free use on the Internet.
If the quantity of feet is known, but the goal is to convert into a quantity measured by centimeters, this can be done by the same logic, except in reverse. So, to convert a quantity in feet to centimeters, the quantity must be divided by .032808.
The decimal that is used for these types of conversions, .032808, represents the fact that centimeters and inches do not evenly convert into one another. This stems from the fact that they are measurements that belong to different measurement systems. While a centimeter is 100th of a meter and is part of the metric system, a foot represents a third of a yard and originates from the imperial and U.S. customary measurement systems. A yard is equal to .9144 meters, which makes a foot equal to .3048 meters, or 30.48 centimeters. This is usually rounded so that 1 imperial foot is defined as 30.5 centimeters.