The waist length of an isosceles trapezoid is 6 cm, its lower base is 10 cm, and its upper base is half of the lower base. What is the perimeter of this trapezoid in cm?
一个等腰梯形的腰长是6厘米，它的下底是10厘米，上底是下底的一半，这个梯形的周长是多少厘米？
<gadget id="calculator">10 / 2</gadget>
<output>5</output>

<gadget id="calculator">6 * 2</gadget>
<output>12</output>

<gadget id="calculator">5 + 10 + 12</gadget>
<output>27</output>

<result>27</result>