The distance between the school classroom and the library is 77.5 meters. Wang Dong walked a total of 250 steps from the classroom to the library. What is the average length of one step in meters?
学校教室到图书馆相距77.5米，王东从教室到图书馆来回一趟共走了250步，走一步的平均长度是多少米．
<gadget id="calculator">250 / 2</gadget>
<output>125</output>

<gadget id="calculator">77.5 / 125</gadget>
<output>0.62</output>

<result>0.62</result>