How to change feet to centimeters and feet centimeters to gallons

- - To change a length in feet to the same length in centimeters,

you can multiply the number by 30.48.

- - There is no such unit as foot-centimeter, and if there were, I guess

it would have to be a unit of area, not volume, so there would be no way

to convert it to an equivalent number of gallons ...