The outer diameter of the bicycle wheel is 0.7m, and it rotates 100 times per minute. It takes 20 minutes to go from home to school. How long is the road from home to school?
自行车的车轮外直径是0.7m，每分钟转100圏，从家到学校要20分钟，从家到学校的路大约长多少m？
<gadget id="calculator">3.14 * 0.7 * 100 * 20</gadget>
<output>4_396</output>

<result>4_396</result>