Xiaoqiao has to walk 2250 meters from home to school, and her walking speed is 75 meters per minute. How many minutes does it take to go back and forth from home to school?
小巧从家到学校要走2250米，她步行的速度是75米/分，从家到学校往返一次需要多少分钟？
<gadget id="calculator">2_250 / 75</gadget>
<output>30</output>

<gadget id="calculator">30 * 2</gadget>
<output>60</output>

<result>60</result>