Xiaomei's home is 250 meters away from school, and Xiaomei walks 50 meters per minute. If she walks to and from school, how long will it take?
小梅家离学校250米，小梅每分钟走50米，如果她步行往返学校，要用多长时间？
<gadget id="calculator">2 / 50</gadget>
<output>1/25 = around 0.04</output>

<gadget id="calculator">250 * (1/25)</gadget>
<output>10</output>

<result>10</result>