The electronic dog can walk back and forth on the set track. If the electronic dog walks 3 meters per minute, how long should the track be to make the electronic dog walk back and forth once every (3/8) minute?
电子狗可以在设定的轨道上来回行走．若电子狗每分钟行走3米，要使电子狗(3/8)分钟来回走动一次，轨道应多长？
<gadget id="calculator">3 / 8</gadget>
<output>3/8 = around 0.375</output>

<gadget id="calculator">(3/8) / 2</gadget>
<output>3/16 = around 0.1875</output>

<gadget id="calculator">3 * (3/16)</gadget>
<output>9/16 = around 0.5625</output>

<result>9/16 = around 0.5625</result>