The outer diameter of a bicycle tire is 70cm. It takes Mr. Li 10 minutes to ride the bicycle from home to the library. If the wheel rotates 200 times per minute, how many meters is the distance Mr. Li travels from home to the library?
一种自行车轮胎的外直径是70cm，李老师骑自行车从家到图书馆用了10分钟，如果车轮每分钟转200周，李老师从家到图书馆的路程是多少m？
<gadget id="calculator">70 / 100</gadget>
<output>7/10 = around 0.7</output>

<gadget id="calculator">3.14 * (7/10) * 200 * 10</gadget>
<output>4_396</output>

<result>4_396</result>