There is a trapezoidal flower bed in Wolong Primary School. The upper base of the flower bed is 6 meters long, the lower base is 8 meters long, and the two waists are 5 meters long. If there is a guardrail around the flower bed, how long is the guardrail?
卧龙小学有一个梯形花坛，花坛上底长6米，下底长8米，两腰各长5米．如果在花坛四周围上护栏，护栏长多少米？
<gadget id="calculator">5 * 2</gadget>
<output>10</output>

<gadget id="calculator">6 + 8 + 10</gadget>
<output>24</output>

<result>24</result>