train passes a bridge at a speed of 2160 meters per minute. The time for the whole train to be on the bridge is 2.5 minutes. The length of the bridge is known to be 5680 meters. How long is the train in meters?
一列火车以每分钟2160米的速度通过一座桥，整列火车完全在桥上的时间为2.5分钟，已知桥长为5680米，这列火车的长多少米．
<gadget id="calculator">2_160 * 2.5</gadget>
<output>5_400</output>

<gadget id="calculator">5_680 - 5_400</gadget>
<output>280</output>

<gadget id="calculator">280 / 2</gadget>
<output>140</output>

<result>140</result>