ship travels 25.6 kilometers per hour and reaches its destination in 3.5 hours. It took 2.8 hours to return, how many kilometers per hour was driven on average when returning?
一艘轮船，每小时行驶25.6千米，3.5小时到达目的地．返回时用了2.8小时，返回时平均每小时行驶多少千米？
<gadget id="calculator">3.5 / 2.8</gadget>
<output>1.25</output>

<gadget id="calculator">25.6 * 1.25</gadget>
<output>32</output>

<result>32</result>