A car wheel with an outer diameter of 8 decimeters rotates 280 times per minute. It takes 5 minutes to pass through a tunnel. How long is the tunnel? (body is ignored)
一辆汽车轮外直径是8分米，每分钟转动280圈，它在通过一条隧道时用了5分钟，这条隧道长多少米？(车身忽略不计)
<gadget id="calculator">3.14 * 0.8 * 280</gadget>
<output>703.36</output>

<gadget id="calculator">703.36 * 5</gadget>
<output>3_516.8</output>

<result>3_516.8</result>