Xiao Ming goes to school by bicycle every day. The outer diameter of the bicycle tire is 78 cm. The bicycle rotates 120 times per minute. It takes him 7 minutes to get to school. How far is Xiao Ming's home from the school?
小明每天骑自行车上学，自行车轮胎的外直径是78厘米，自行车每分钟转120圈，他要7分钟才能到校，小明家离学校有多远？
<gadget id="calculator">78 / 100</gadget>
<output>39/50 = around 0.78</output>

<gadget id="calculator">3.14 * (39/50) * 120 * 7</gadget>
<output>2_057.328</output>

<result>2_057.328</result>