long-distance bus travels 255 kilometers in 3 hours in the morning. At this speed, it travels for another 5 hours in the afternoon. How many kilometers has it traveled in the whole day?
一辆长途客车上午3小时行255千米，照这样的速度，下午又行了5小时，全天一共行了多少千米？
<gadget id="calculator">255 / 3</gadget>
<output>85</output>

<gadget id="calculator">85 * 5</gadget>
<output>425</output>

<gadget id="calculator">425 + 255</gadget>
<output>680</output>

<result>680</result>