Power Supply

I recently purchased in the United States an Inspiron N5110.  I am travelling to Korea in the fall.  Korea uses 220 volt power with a different shaped plug.  I know I'll need an adaptor, but I don't know if the power supply that comes with the Inspiron will not blow up (OK, exageration) if I plug it into the Korean wall socket.

So, do I just need an adaptor, or will I also need to bring the voltage down, too?  And if the latter, does anyone have any suggestions for an inexpensive voltage converter?