It takes 25 seconds for a train to pass through a 300-meter tunnel, and 28 seconds to pass through a 360-meter bridge. Question: If this train travels opposite to another train with a length of 408 meters and a speed of 64.8 km/h, then the two trains How many seconds does it take to go from meeting to parting?
某列车通过300米的隧道用25秒，通过360米的大桥用28秒，问：如该列车与另一列长408米、速度为64.8千米/时的列车相向而行，那么，两列列车从相遇到相离总共需要几秒？
<gadget id="calculator">360 - 300</gadget>
<output>60</output>

<gadget id="calculator">28 - 25</gadget>
<output>3</output>

<gadget id="calculator">60 / 3</gadget>
<output>20</output>

<gadget id="calculator">20 * 25</gadget>
<output>500</output>

<gadget id="calculator">500 - 300</gadget>
<output>200</output>

<gadget id="calculator">200 + 408</gadget>
<output>608</output>

<gadget id="calculator">20 + 18</gadget>
<output>38</output>

<gadget id="calculator">608 / 38</gadget>
<output>16</output>

<result>16</result>