A convoy sent a batch of relief supplies to the disaster area. It traveled 88 kilometers per hour when going there, arrived at the disaster area in 9 hours, and traveled 72 kilometers per hour when it returned. How long will it take to return to the starting point?
某车队向灾区送一批救灾物资，去时每小时行88千米，9小时到达灾区，回来时每小时行72千米，多长时间能够返回出发地点？
<gadget id="calculator">9 / 72</gadget>
<output>1/8 = around 0.125</output>

<gadget id="calculator">88 * (1/8)</gadget>
<output>11</output>

<result>11</result>