AC fundamentals

A power transmission line feeds input power at $2.3 \mathrm{~kV} to a step down transformer with its primary winding having 3000 turns. The output power is delivered at 230 \mathrm{~V} by the transformer. The current in the primary of the transformer is 5 \mathrm{~A} and its efficiency is 90 \%. The winding of transformer is made of copper. The output current of transformer is _________ A$.