The outer diameter of a bicycle tire is 70cm. It took Xiao Ming 10 minutes to ride the bicycle from home to the library. If the wheel rotates 100 times per minute, how many meters is the distance from Xiao Ming's house to the library?
一种自行车轮胎的外直径是70cm，小明骑自行车从家到图书馆用了10分钟．如果车轮每分钟转100周，从小明家到图书馆的路程是多少米？
<gadget id="calculator">70 / 100</gadget>
<output>7/10 = around 0.7</output>

<gadget id="calculator">3.14 * (7/10) * 100 * 10</gadget>
<output>2_198</output>

<result>2_198</result>