It took a truck 6 hours to deliver fertilizer from the county town to Lizhuang at a speed of 55 kilometers per hour, and it took 5 hours to return by the same road. What was the speed when returning?
一辆货车从县城以每小时55千米的速度送化肥去李庄用了6小时，按原路返回时用了5小时，返回时的速度是多少千米/时？
<gadget id="calculator">6 / 5</gadget>
<output>6/5 = around 1.2</output>

<gadget id="calculator">55 * (6/5)</gadget>
<output>66</output>

<result>66</result>