car travels from A to B at an average of 48 kilometers per hour and arrives in (3/4) hours. The car only took (6/7) hours when it came back from the original road. How many kilometers per hour did it travel on average when it came back? (Solution by proportional method)
一辆汽车从甲地开往乙地，平均每小时行48千米，(3/4)小时到达．这辆汽车从原路回来时只用了(6/7)小时，回来时平均每小时行多少千米？(用比例方法解)
<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">48 * (3/4)</gadget>
<output>36</output>

<gadget id="calculator">7 / 6</gadget>
<output>7/6 = around 1.166667</output>

<gadget id="calculator">36 * (7/6)</gadget>
<output>42</output>

<result>42</result>