On a double-track railway, there is a passenger car running at 72 kilometers per hour. The driver of the passenger car finds a freight car running at 90 kilometers per hour on the opposite side. At this time, it takes 8 seconds for the freight car to pass by him. Ask for the car of the freight car. long?
在双轨铁路上，有一列每小时运行72千米的客车，客车司机发现对面开来一列每小时运行90千米的货车，这时货车从他身边驶过用了8秒钟，求货车的车长？
<gadget id="calculator">90 + 72</gadget>
<output>162</output>

<gadget id="calculator">162 * 8</gadget>
<output>1_296</output>

<result>1_296</result>