The outer diameter of a wheel is 0.86 meters. If the wheel rotates 120 times in 6 minutes, how many meters does the car move forward per minute?
一个车轮的外直径是0.86米，如果车轮6分钟转120周，车子平均每分钟前进多少米？
<gadget id="calculator">120 / 6</gadget>
<output>20</output>

<gadget id="calculator">3.14 * 0.86 * 20</gadget>
<output>54.008</output>

<result>54.008</result>