android shell

how can I get android filesystem size in bytes from adb shell?

If I run from android shell the df command I get the sizes of all filesystems in human readable numbers. It seems that the command doesn’t take any options (e.g. -something).

I want to get the exact size of the filesystem (in bytes).

I know I can get the sizes by creating an app which uses statfs. Is there any OTHER WAY to do it (via command)?