train is 215 meters long, travels 25 meters per second, and passes a bridge in 47 seconds. How long is the bridge?
一列火车长215米，每秒钟行驶25米，经过47秒钟通过一座桥，这座桥有多长？
<gadget id="calculator">25 * 47</gadget>
<output>1_175</output>

<gadget id="calculator">1_175 - 215</gadget>
<output>960</output>

<result>960</result>