$${\mathtt{327\,000\,000\,000\,000}}{\mathtt{\,\times\,}}\left({\frac{{\mathtt{1\,000}}}{{\mathtt{1}}}}\right){\mathtt{\,\times\,}}\left({\frac{{\mathtt{1}}}{{\mathtt{9\,460\,528\,400\,000\,000}}}}\right) = {\mathtt{34.564\: \!665\: \!542\: \!360\: \!192\: \!1}}$$
Sorry, but I have not figured out scientific notation yet. The first number is the number of km you were given. The parenthesis is the conversion to meters, since the conversion factor that I found is meters to light-years.
So about 35 light-years.
