Xiao Ming travels an average of 200 meters per minute from home to the bookstore, and arrives in 15 minutes. When he returns to the original road, he only takes 12 minutes to get home. How many meters per minute on average?
小明骑车从家去书店平均每分钟行200米，15分钟到达，原路返回时只用12分钟就到家，回来平均每分钟行多少米？
<gadget id="calculator">15 / 12</gadget>
<output>5/4 = around 1.25</output>

<gadget id="calculator">200 * (5/4)</gadget>
<output>250</output>

<result>250</result>