A car travels from A to B at a speed of 90 km/h and arrives in 8 hours. It took 2 hours less time to return from point B to point A. What was the average speed of the car in km/h when it returned?
一辆汽车以90千米/时的速度从甲地开往乙地，8小时到达．从乙地返回甲地时少用了2小时．这辆汽车返回时的平均速度是多少千米/时？
<gadget id="calculator">8 - 2</gadget>
<output>6</output>

<gadget id="calculator">8 / 6</gadget>
<output>4/3 = around 1.333333</output>

<gadget id="calculator">90 * (4/3)</gadget>
<output>120</output>

<result>120</result>