  We present and review an efficient method to calculate the retarded Green's
function in multi-terminal nanostructures; which is needed in order to
calculate the conductance through the system and the local particle densities
within it. The method uses the recursive Green's function method after the
discretized Hamilton matrix has been properly partitioned. We show that this
method, the circular slicing scheme, can be modified to accommodate
multi-terminal systems as well as the traditional two-terminal systems.
Furthermore, we show that the performance and robustness of the circular
slicing scheme is on par with other advanced methods and is well suited for
large variety of multi-terminal geometries. We end by giving an example of how
the method can be used to calculate transport in a non-trivial multi-terminal
geometry.
