Xiao Ming's home is 2198 meters away from the school. He rides a bicycle home every day. The tire diameter of the bicycle is 70 cm. If the bicycle rotates 80 times per minute, how long will it take for Xiao Ming to get home?
小明家离学校有2198米，他每天骑自行车回家，自行车的轮胎直径是70厘米，如果自行车每分钟转80圈，小明多长时间可以到家？
<gadget id="calculator">70 / 100</gadget>
<output>7/10 = around 0.7</output>

<gadget id="calculator">3.14 * (7/10) * 80</gadget>
<output>175.84</output>

<gadget id="calculator">2_198 / 175.84</gadget>
<output>12.5</output>

<result>12.5</result>