The diameter of a magnetic rod is lcm, and the enamelled money is used to wrap 60 circles on this magnetic rod, how many centimeters of enamelled money is needed at least?
一根磁棒的直径是lcm，用漆包钱在这根磁棒上缠绕60圈，至少需要漆包钱多少厘米？
<gadget id="calculator">3.14 * 1 * 60</gadget>
<output>188.4</output>

<result>188.4</result>