The diameter of a wheel is 60 cm, how many meters does the wheel move in one revolution?
一个车轮的直径为60cm，车轮转动一周，大约前进多少米．
<gadget id="calculator">60 / 100</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">3.14 * (3/5)</gadget>
<output>1.884</output>

<result>1.884</result>