An acrobatic unicycle rolls 250 times on a 314-meter track. What is the diameter of the wheel of this acrobatic unicycle?
一种杂技独轮车，在314米的跑道上要滚动250周，这种杂技独轮车的车轮直径是多少米？
<gadget id="calculator">314 / 250 / 3.14</gadget>
<output>0.4</output>

<result>0.4</result>