Your input is what the wall socket can supply and what your adapter takes in. Your output is what the adapter give out to supply your device.
Just one more thing to make sure - I need to know how many watts my device needs, so it won't be higher than what the transformer can handle. How do I know from the picture how many watts I need? I understood that Volts x Amps = Watts. So I do 230 x 0.28 (mA) = 65 watts?