Xiao Ming runs 2.6 kilometers at 0.5 hours, and Xiao Hua's cycling speed is twice that of Xiao Ming's. How many kilometers does Xiao Hua travel per hour?
小明0.5时跑步2.6千米，小华骑车的速度是小明的2倍，小华骑车每小时行多少千米？
<gadget id="calculator">2.6 / 0.5</gadget>
<output>5.2</output>

<gadget id="calculator">5.2 * 2</gadget>
<output>10.4</output>

<result>10.4</result>