It is known that the diameter of a bicycle wheel is 0.8 meters, and it can roll 25 times per minute. How many minutes does it take to pass a 502.4-meter-long bridge?
已知自行车轮子的直径为0.8米，每分钟能滚动25圈，要通过一座长502.4米的大桥，需要多少分钟？
<gadget id="calculator">3.14 * 0.8 * 25</gadget>
<output>62.8</output>

<gadget id="calculator">502.4 / 62.8</gadget>
<output>8</output>

<result>8</result>