A truck travels 45 kilometers per hour from point A to point B. It takes (4/5) hours to get there, and it takes only (2/3) hours to return. How many kilometers per hour does the truck travel when it returns?
一辆货车从甲地到乙地，每小时行45千米，需要(4/5)小时到达，返回时只用了(2/3)小时，这辆货车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">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">(4/5) / (2/3)</gadget>
<output>6/5 = around 1.2</output>

<gadget id="calculator">45 * (6/5)</gadget>
<output>54</output>

<result>54</result>