The radius of a bicycle wheel is about 3.5dm. If it rotates 100 cycles per minute on average, how many minutes will it take to ride a distance of 6594m?
自行车车轮的半径大约是3.5dm，如果平均每分钟旋转100周，要骑6594m长的路程，大约需要多少分钟？
<gadget id="calculator">3.5 / 10</gadget>
<output>0.35</output>

<gadget id="calculator">2 * 3.14 * 0.35 * 100</gadget>
<output>219.8</output>

<gadget id="calculator">6_594 / 219.8</gadget>
<output>30</output>

<result>30</result>