car travels from A to B at a speed of 75 km/h and arrives in 6 hours. It takes 5 hours to return from point B to point A. What is the average speed of the car when returning?
一辆汽车以75千米/时的速度从甲地开往乙地，6小时到达．从乙地返回甲地用了5小时，这辆汽车返回时的平均速度是多少千米/时？
<gadget id="calculator">6 / 5</gadget>
<output>6/5 = around 1.2</output>

<gadget id="calculator">75 * (6/5)</gadget>
<output>90</output>

<result>90</result>