A bicycle has a wheel with a radius of 30 cm. If the bicycle passes a street 942 meters long, how many revolutions does the wheel need to make?
一辆自行车的车轮半径为30厘米，如果这辆自行车经过一条942米长的街道，车轮需要转多少周？
<gadget id="calculator">30 / 100</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">2 * 3.14 * (3/10)</gadget>
<output>1.884</output>

<gadget id="calculator">942 / 1.884</gadget>
<output>500</output>

<result>500</result>