A person runs a circle on a 360-meter-long circular track. It is known that he runs 5 meters per second for the first half of the time, and 4 meters per second for the second half of the time. How many seconds does he run for the second half of the distance?
某人在360米长的环形跑道上跑了一圈，已知他前一半时间每秒钟跑5米，后一半时间每秒钟跑4米，则他后一半路程跑了多少秒钟．
<gadget id="calculator">5 + 4</gadget>
<output>9</output>

<gadget id="calculator">360 / 9</gadget>
<output>40</output>

<gadget id="calculator">360 / 2</gadget>
<output>180</output>

<gadget id="calculator">4 * 40</gadget>
<output>160</output>

<gadget id="calculator">180 - 160</gadget>
<output>20</output>

<gadget id="calculator">20 / 5</gadget>
<output>4</output>

<gadget id="calculator">40 + 4</gadget>
<output>44</output>

<result>44</result>