The road from the foot of the mountain to the top of the mountain is 3,000 meters long. It took Xiaohua 3 hours to go up the mountain and 4 hours to go down the mountain along the original road. On average, how many kilometers per hour is Xiaohua going up the mountain faster than going down the mountain?
从山脚到山顶的路长3000米，小华上山用了3小时，沿原路下山用了4小时．小华上山比下山平均每小时快多少千米？
<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">1 - (3/4)</gadget>
<output>1/4 = around 0.25</output>

<result>1/4 = around 0.25</result>