A unicycle rolls 500 times on a track of 62.8 meters. What is the diameter of the wheelbarrow in centimeters?
一种独轮车，在62.8米的跑道上要滚动500周，这种轮车的直径是多少厘米？
<gadget id="calculator">62.8 / 500 / 3.14</gadget>
<output>0.04</output>

<gadget id="calculator">0.04 * 100</gadget>
<output>4</output>

<result>4</result>