\[\boxed{\mathbf{880}.}\]
\[1)\log_{11}1 = \log_{11}11^{0} = 0\]
\[2)\log_{7}7 = \log_{7}7^{1} = 1\]
\[3)\log_{16}64 = \frac{\log_{4}64}{\log_{4}16} =\]
\[= \frac{\log_{4}4^{3}}{\log_{3}4^{2}} = \frac{3}{2} = 1,5\]
\[4)\log_{27}9 = \frac{\log_{3}9}{\log_{3}27} =\]
\[= \frac{\log_{3}3^{2}}{\log_{3}3^{3}} = \frac{2}{3}\]