A car travels from place A to place B at a speed of 64 km/h. It takes 5 hours and only 4 hours to return. What is the speed of this car when it returns?
一辆汽车从甲地到乙地，去时的速度是64千米/时，共用了5小时，返回时只用了4小时，这辆汽车返回时的速度是多少？
<gadget id="calculator">5 / 4</gadget>
<output>5/4 = around 1.25</output>

<gadget id="calculator">64 * (5/4)</gadget>
<output>80</output>

<result>80</result>