A wire is used to wind a circle, a total of 100 circles, with an average diameter of 6 cm per circle. How long is this wire in m?
用一根线绕圆，一共绕了100圈，平均每圈直径为6cm．这根线长多少m？
<gadget id="calculator">100 / 100</gadget>
<output>1</output>

<gadget id="calculator">3.14 * 6 * 1</gadget>
<output>18.84</output>

<result>18.84</result>