One train is 320 meters long and travels 18 meters per second. Another train is coming at a speed of 22 meters per second. It takes 15 seconds for the two trains to meet and separate. Find the length of the other train.
火车，一列长320米，每秒行18米，另一列火车以每秒22米的速度迎面开来，两车从相遇到相离共用了15秒钟，求另一列火车的长度．
<gadget id="calculator">18 + 22</gadget>
<output>40</output>

<gadget id="calculator">40 * 15</gadget>
<output>600</output>

<gadget id="calculator">600 - 320</gadget>
<output>280</output>

<result>280</result>