The speed of the car when going up the mountain is 48 kilometers per hour. It takes 7 hours to reach the top of the mountain. When going down the mountain, it takes only 6 hours to go back the same way. How many kilometers per hour does the car travel on average when going down the mountain?
汽车上山时的速度为每小时48千米，行了7小时到达山顶，下山时按原路返回只用了6小时，汽车下山时平均每小时行多少千米？
<gadget id="calculator">7 / 6</gadget>
<output>7/6 = around 1.166667</output>

<gadget id="calculator">48 * (7/6)</gadget>
<output>56</output>

<result>56</result>