The car drove from Li Village to Wang Village at a speed of 45 km/h, arrived in 8 hours, and only took 5 hours to return. What was the speed when returning?
汽车从李村开往王村，去时速度是45千米/时，8小时到达，返回时只用了5小时，返回时的速度是多少？
<gadget id="calculator">8 / 5</gadget>
<output>8/5 = around 1.6</output>

<gadget id="calculator">45 * (8/5)</gadget>
<output>72</output>

<result>72</result>