The outer diameter of a bicycle tire is about 70 cm. If it rotates 100 times per minute, how many meters can it advance?
一个自行车轮胎的外直径约70厘米，如果每分钟转100周，可前进多少米？
<gadget id="calculator">70 / 100</gadget>
<output>7/10 = around 0.7</output>

<gadget id="calculator">3.14 * (7/10) * 100</gadget>
<output>219.8</output>

<result>219.8</result>