The radius of a bicycle wheel is 35 centimeters, how many centimeters does the bicycle advance when the wheel rolls once?
一辆自行车轮的半径是35厘米，车轮滚动一周自行车前进多少厘米．
<gadget id="calculator">3.14 * 2 * 35</gadget>
<output>219.8</output>

<result>219.8</result>