The diameter of a wheel is 55 centimeters, how many meters will the wheel move in 2 revolutions?
一个车轮的直径是55厘米，车轮转动2周，大约前进多少米．
<gadget id="calculator">2 / 100</gadget>
<output>1/50 = around 0.02</output>

<gadget id="calculator">3.14 * 55 * (1/50)</gadget>
<output>3.454</output>

<result>3.454</result>