Solve the given problem. If $x=\ln 3$ and $y=\ln 2$, express $\ln 36$ in terms of $x$ and $y$. \[ \ln 36= \]

Step 1 ：Given that $x=\ln 3$ and $y=\ln 2$, we are asked to express $\ln 36$ in terms of $x$ and $y$.

Step 2 ：We know that $36 = 2^2 * 3^2$. Therefore, we can express $\ln 36$ as $\ln (2^2 * 3^2)$.

Step 3 ：Using the properties of logarithms, we can simplify this expression to $2\ln 2 + 2\ln 3$.

Step 4 ：Since $x=\ln 3$ and $y=\ln 2$, we can substitute these values into the expression to get $2y + 2x$.

Step 5 ：\(\boxed{\ln 36 = 2x + 2y}\)