Xiaohong plays around a promenade and walks clockwise. It takes 10 seconds to go from A to C, 16 seconds to go from B to A, and 12 seconds to go from C to B. How many seconds does it take her to go from C to A?
小红绕一长廊四周玩耍，顺时针走，从A到C要10秒钟，从B到A要16秒钟，从C到B要12秒，求她从C到A要多少秒？
<gadget id="calculator">12 - 10</gadget>
<output>2</output>

<gadget id="calculator">2 + 16</gadget>
<output>18</output>

<gadget id="calculator">18 / 2</gadget>
<output>9</output>

<result>9</result>