Li Hong and his parents went to Nanjing by car. The speed of the car was 80 km/h when he went there, and he traveled for 3 hours. When he came back, he traveled for 4 hours. What is the approximate speed of the car when returning from Nanjing?
李红同学和父母一起坐车去南京游玩，去的时候汽车的速度是80千米/时，行了3小时，回来的时候行了4小时．从南京回来的时候，汽车的速度大约是多少？
<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">80 * (3/4)</gadget>
<output>60</output>

<result>60</result>