path is 47.1 meters long. Guoguo rolls a hoop on the path. The diameter of the hoop is 15 cm. How many times does the hoop have to turn when rolling from one end of the path to the other?
一条小路长为47.1米，果果在小路上滚铁环，铁环的直径是15厘米，从小路的一端滚到另一端，铁环要转多少圈？
<gadget id="calculator">15 / 100</gadget>
<output>3/20 = around 0.15</output>

<gadget id="calculator">3.14 * (3/20)</gadget>
<output>0.471</output>

<gadget id="calculator">47.1 / 0.471</gadget>
<output>100</output>

<result>100</result>