Divide by one. You could also multiply by one. (or do both.)
Multiply it and you'll get the answer.
16*24 = 384 square inches.
An inch is a measure of length. What do you want to convert it to? To convert it to metric, if you multiply the number of inches by 2.54 you get the equivalent in centimeters.
(16" x 16") = 256 square inches (256 square inches) / (144 square inches per square foot) = 1 and 7/9 square feet