A truck and a bus are traveling towards each other. The two vehicles meet at point A and stagger at point B. The distance between point A and point B is 150 meters. It is known that the length of the passenger car is 450 meters, the speed is 108 kilometers per hour, and the speed of the truck is 72 kilometers per hour. If the truck is longer than the passenger car, what is the length of the truck?
货车和客车相向而行，两车在A点迎面相遇，在B点错开，A点和B两点之间的距离为150米．已知客车的长度为450米，速度为每小时108公里，货车的速度为每小时72公里．如果货车比客车长，那么货车的长度是多少？
<gadget id="calculator">450 + 150</gadget>
<output>600</output>

<gadget id="calculator">600 / 108_000</gadget>
<output>1/180 = around 0.005556</output>

<gadget id="calculator">72_000 * (1/180)</gadget>
<output>400</output>

<gadget id="calculator">400 + 150</gadget>
<output>550</output>

<result>550</result>