A bundle of wires is wound 9 times, each with a diameter of 48 cm. How long is the bundle of wires in meters?
一捆电线绕了9圈，每圈直径都是48厘米，这捆电线长多少米？
<gadget id="calculator">9 / 100</gadget>
<output>9/100 = around 0.09</output>

<gadget id="calculator">3.14 * 48 * (9/100)</gadget>
<output>13.5648</output>

<result>13.5648</result>