Uncle Liu travels an average of 58.5 kilometers per hour from point A to point B, takes 2 hours to arrive, and takes 2.5 hours to return. Find the speed when returning?
刘叔叔从A地到B地平均每小时行驶58.5千米，2小时到达，返回时用2.5小时，求返回时的速度？
<gadget id="calculator">2 / 2.5</gadget>
<output>0.8</output>

<gadget id="calculator">58.5 * 0.8</gadget>
<output>46.8</output>

<result>46.8</result>