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A team of American engineers is working with a team in Germany to design an engine. They need to know the volume of the interior of a piston; in this engine, the volume of each piston is given by
\begin{align*}
V(x) = 10.125\pi x^2
\end{align*}
where is the diameter of the piston in centimeters. However, the American team took all their measurements in inches. There are 2.54 centimeters in each inch.

a) Write a formula that converts inches to centimeters.

b) Give a formula for the volume of the cylinder which has input in inches.