Xiaohong is practicing running. She ran back and forth 3 times from start to finish on a runway, running a total of 600 meters. How long is this runway in meters?
小红在练习跑步．她在一条跑道上从头到尾跑了3个来回，共跑了600米．这条跑道长多少米？
<gadget id="calculator">600 / 3 / 2</gadget>
<output>100</output>

<result>100</result>