A train traveling at the same speed takes 9 seconds to pass a telephone pole with a signal light, and 36 seconds to pass a 432-meter-long iron bridge. How long is the train in meters?
一列以相同速度行驶的火车，经过一根有信号灯的电线杆用了9秒，通过一座432米长的铁桥用了36秒，这列火车长多少米．
<gadget id="calculator">36 - 9</gadget>
<output>27</output>

<gadget id="calculator">432 / 27</gadget>
<output>16</output>

<gadget id="calculator">16 * 9</gadget>
<output>144</output>

<result>144</result>