A car travels from A to B at a speed of 80 km/h. It takes 5 hours and only 4 hours to return. How many kilometers does the car travel per hour?
一辆汽车以80千米⁄小时的速度从甲地开往乙地，用了5小时，返回时只用了4小时，这辆车返回每小时行驶多少千米？
<gadget id="calculator">5 / 4</gadget>
<output>5/4 = around 1.25</output>

<gadget id="calculator">80 * (5/4)</gadget>
<output>100</output>

<result>100</result>