Xiaohong and Xiaoming set off from the campus to the botanical garden by bike at the same time. Xiaohong travels 10 kilometers per hour, and Xiao Ming travels 14 kilometers per hour. After 3 hours, how many kilometers are there between Xiaohong and Xiaoming?
小红和小明同时从校园骑车出发去植物园．小红每小时行10千米，小明每小时行14千米．3小时后，小红和小明相距多少千米？
<gadget id="calculator">14 - 10</gadget>
<output>4</output>

<gadget id="calculator">4 * 3</gadget>
<output>12</output>

<result>12</result>