Li Wei's walking speed is 6 kilometers per hour, and it takes 6 minutes less to travel 1 kilometer by cycling instead of walking, so what is his speed in kilometers per hour when riding a bicycle?
李伟步行的速度是6千米/小时，改骑自行车每行1千米比步行少用6分钟，那么他骑自行车的速度是每小时多少千米？
<gadget id="calculator">60 / 6</gadget>
<output>10</output>

<gadget id="calculator">10 - 6</gadget>
<output>4</output>

<gadget id="calculator">4 / 60</gadget>
<output>1/15 = around 0.066667</output>

<gadget id="calculator">1 / (1/15)</gadget>
<output>15</output>

<result>15</result>