A bundle of wires is coiled into 10 turns, and the diameter of each turn is 0.3 meters. What is the length of the bundle of wires in meters?
一捆电线盘成10圈，每圈的直径是0.3米，这捆电线长约为多少米．
<gadget id="calculator">3.14 * 0.3 * 10</gadget>
<output>9.42</output>

<result>9.42</result>