bicycle tire with an outer diameter of 6 decimeters rotates 80 times per minute, how many meters can it advance per minute?
一种自行车的轮胎外直径是6分米，每分钟转动80周，每分钟能前进多少米？
<gadget id="calculator">6 / 10</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">3.14 * (3/5) * 80</gadget>
<output>150.72</output>

<result>150.72</result>