Uncle Zhang drove to the disaster area to deliver goods at a speed of 45 km/h and arrived in 8 hours. It only took 6 hours to come back the same way. How fast is it coming back?
张叔叔开车去灾区送货，去时速度45千米/时，8小时到达．原路回来只用6小时．回来的速度是多少？
<gadget id="calculator">8 / 6</gadget>
<output>4/3 = around 1.333333</output>

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

<result>60</result>