truck delivers goods from A to B, travels 45 kilometers per hour, and delivers to B in 8 hours. When it comes back, it travels 60 kilometers per hour. How long can it return?
一辆货车从甲地到乙地送货，去时每小时行45千米，8小时送到乙地．回来时每小时行60千米，它几小时能返回？
<gadget id="calculator">8 / 60</gadget>
<output>2/15 = around 0.133333</output>

<gadget id="calculator">45 * (2/15)</gadget>
<output>6</output>

<result>6</result>