When a truck delivers goods, it travels an average of 56 kilometers per hour, and it takes 48 hours to reach the destination; when it returns, it only travels for 28 hours. How many kilometers per hour does it travel on average?
一辆卡车送货时，平均每小时行56千米，到达目的地刚好行驶48小时；返回时只行驶28小时，返回时平均每小时行多少千米？
<gadget id="calculator">48 / 28</gadget>
<output>12/7 = around 1.714286</output>

<gadget id="calculator">56 * (12/7)</gadget>
<output>96</output>

<result>96</result>