A car goes back and forth between A and B at a speed of 48 km/h. It takes 4 hours and only 3 hours to return. What was the speed of the car when it returned?
一辆汽车往返于甲、乙两地，去时的速度为48千米/时，用了4小时，返回时只用了3小时．这辆汽车返回时的速度是多少？
<gadget id="calculator">4 / 3</gadget>
<output>4/3 = around 1.333333</output>

<gadget id="calculator">48 * (4/3)</gadget>
<output>64</output>

<result>64</result>