Wrong no decimals

Step 1: The formula for the circumference of a circle is $C = \pi d$, where $d$ is the diameter in cm.

Step 2: Substitute $d = 10$ cm into the formula: $C = \pi \times 10~\mathrm{cm}$.

Step 3: Simplify: $C = 10\pi~\mathrm{cm}$.

Final answer: 10\pi~\mathrm{cm}