A car travels 45 kilometers per hour from Linxia to Hezuo in 4 hours, and it takes 3 hours to return. How many kilometers per hour does the car travel on average when it returns?
一辆汽车从临夏到合作每小时行45千米，用4小时，返回时用了3小时，这辆汽车返回时平均每小时行多少千米？
<gadget id="calculator">4 / 3</gadget>
<output>4/3 = around 1.333333</output>

<gadget id="calculator">45 * (4/3)</gadget>
<output>60</output>

<result>60</result>