A wire with a length of 47.1 meters is wound 10 times around a pillar. What is the diameter of the pillar?
一根长为47.1米的铁丝在一个柱子上绕了10圈，这个柱子的直径是多少？
<gadget id="calculator">47.1 / 10 / 3.14</gadget>
<output>1.5</output>

<result>1.5</result>