A special car transporting disaster relief supplies travels 65 kilometers per hour when going there, arrives in 4 hours, and arrives in 5 hours when returning. How many kilometers per hour does it travel when returning?
一辆运送救灾物资的专车，去时每小时行65千米，4小时到达，返回时，5小时到达，返回时每小时行多少千米？
<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">65 * (4/5)</gadget>
<output>52</output>

<result>52</result>