A bundle of wires has 30 turns, and the diameter of each turn is 0.6 m. Find the total length of the wires.
一捆电线有30圈，每圈的直径是0.6米，求电线的总长．
<gadget id="calculator">3.14 * 0.6 * 30</gadget>
<output>56.52</output>

<result>56.52</result>