The road from A to B is 250 kilometers long. A bus and a truck drive from A to B at the same time. The bus travels 100 kilometers per hour, and the truck travels 80 kilometers per hour. How many kilometers did the truck travel when the bus arrived at point B?
甲地到乙地的公路长250千米，一辆客车和一辆货车同时从甲地开往乙地，客车每小时行100千米，货车每小时行80千米．客车到达乙地时，货车行了多少千米？
<gadget id="calculator">250 / 100</gadget>
<output>5/2 = around 2.5</output>

<gadget id="calculator">80 * (5/2)</gadget>
<output>200</output>

<result>200</result>