The diameter of a car wheel is 0.5 meters, the car travels 314 meters, how many weeks does the wheel roll?
汽车车轮的直径是0.5米，汽车行驶314米，车轮滚动了几周？
<gadget id="calculator">3.14 * 0.5</gadget>
<output>1.57</output>

<gadget id="calculator">314 / 1.57</gadget>
<output>200</output>

<result>200</result>