\problemname{Simple Arithmetic}

You are given three integers $a, b, c$ ($1 \le a, b, c \le 10^9$). Compute $a \cdot b / c$, with an \emph{absolute} precision of $10^{-6}$.

\section*{Input}
The first and only line of input contains the three integers $a, b, c$ separated by a single space.

\section*{Output}
Output a single floating point number. It must differ from $a \cdot b / c$ by at most $10^{-6}$ in absolute value, i.e., it should obey $|x - a \cdot b / c| \le 10^{-6}$.

\section*{Constraints}
Your solution will be tested on a set of test groups, each worth a number of points.
Each test group contains a set of test cases.
To get the points for a test group you need to solve all test cases in the test group.
Your final score will be the maximum score of a single submission.

\noindent
\begin{tabular}{| l | l | l |}
\hline
Group & Points & Limits \\ \hline
1     & 25     & $1 \le a, b, c \le 10$ \\ \hline
2     & 25     & $1 \le a, b, c \le 10\,000$ \\ \hline
3     & 25     & $1 \le a, b \le 10^9, c = 1$ \\ \hline
4     & 25     & $1 \le a, b, c \le 10^9$ \\ \hline
\end{tabular}
